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1. The GRAVITY+ Project: Towards All-sky, Faint-Science, High-Contrast Near-Infrared Interferometry at the VLTI

Author: Collaboration, GRAVITY, Abuter, Roberto, Alarcon, Patricio, Allouche, Fatme, Amorim, Antonio, Bailet, Christophe, Bedigan, Helen, Berdeu, Anthony, Berger, Jean-Philippe, Berio, Philippe, Bigioli, Azzurra, Blaho, Richard, Boebion, Olivier, Bolzer, Marie-Lena, Bonnet, Henri, Bourdarot, Guillaume, Bourget, Pierre, Brandner, Wolfgang, Cardenas, Cesar, Conzelmann, Ralf, Comin, Mauro, Clénet, Yann, Courtney-Barrer, Benjamin, Dallilar, Yigit, Davies, Ric, Defrère, Denis, Delboulbé, Alain, Delplancke-Ströbele, Françoise, Dembet, Roderick, de Zeeuw, Tim, Drescher, Antonia, Eckart, Andreas, Édouard, Clemence, Eisenhauer, Frank, Fabricius, Maximilian, Feuchtgruber, Helmut, Finger, Gert, Schreiber, Natascha M. Förster, Fuenteseca, Eloy, Garcia, Enrique, Garcia, Paulo, Gao, Feng, Gendron, Eric, Genzel, Reinhard, Gil, Juan Pablo, Gillessen, Stefan, Gomes, Tiago, Gonté, Frédéric, Gouvret, Carole, Guajardo, Patricia, Guidolin, Ivan, Guieu, Sylvain, Guzmann, Ronald, Hackenberg, Wolfgang, Haddad, Nicolas, Hartl, Michael, Haubois, Xavier, Haußmann, Frank, Heißel, Gernot, Henning, Thomas, Hippler, Stefan, Hönig, Sebastian, Horrobin, Matthew, Hubin, Norbert, Jacqmart, Estelle, Jocou, Laurent, Kaufer, Andreas, Kervella, Pierre, Kirchbauer, Jean-Paul, Kolb, Johan, Korhonen, Heidi, Kreidberg, Laura, Krempl, Peter, Lacour, Sylvestre, Lagarde, Stephane, Lai, Olivier, Lapeyrère, Vincent, Laugier, Romain, Bouquin, Jean-Baptiste Le, Leftley, James, Léna, Pierre, Lewis, Steffan, Lutz, Dieter, Magnard, Yves, Mang, Felix, Marcotto, Aurelie, Maurel, Didier, Mérand, Antoine, Millour, Florentin, More, Nikhil, Nowack, Hugo, Nowak, Matthias, Oberti, Sylvain, Olivares, Francisco, Ott, Thomas, Pallanca, Laurent, Paumard, Thibaut, Perraut, Karine, Perrin, Guy, Petrov, Romain, Pfuhl, Oliver, Pourré, Nicolas, Rabien, Sebastian, Rau, Christian, Riquelme, Miguel, Robbe-Dubois, Sylvie, Rochat, Sylvain, Salman, Muhammad, Scherbarth, Malte, Schöller, Markus, Schubert, Joseph, Schuhler, Nicolas, Shangguan, Jinyi, Shchekaturov, Pavel, Shimizu, Taro, Scheithauer, Silvia, Sevin, Arnaud, Soenke, Christian, Soulez, Ferreol, Spang, Alain, Stadler, Eric, Straubmeier, Christian, Sturm, Eckhard, Sykes, Calvin, Tacconi, Linda, Tischer, Helmut, Tristram, Konrad, Vincent, Frédéric, von Fellenberg, Sebastiano, Uysal, Sinem, Widmann, Felix, Wieprecht, Ekkehard, Wiezorrek, Erich, Woillez, Julien, Yazıcı, Şenol, and Zins, Gérard
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The GRAVITY instrument has been revolutionary for near-infrared interferometry by pushing sensitivity and precision to previously unknown limits. With the upgrade of GRAVITY and the Very Large Telescope Interferometer (VLTI) in GRAVITY+, these limits will be pushed even further, with vastly improved sky coverage, as well as faint-science and high-contrast capabilities. This upgrade includes the implementation of wide-field off-axis fringe-tracking, new adaptive optics systems on all Unit Telescopes, and laser guide stars in an upgraded facility. GRAVITY+ will open up the sky to the measurement of black hole masses across cosmic time in hundreds of active galactic nuclei, use the faint stars in the Galactic centre to probe General Relativity, and enable the characterisation of dozens of young exoplanets to study their formation, bearing the promise of another scientific revolution to come at the VLTI., Comment: Published in the ESO Messenger
Published: 2023
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2. Impact of local turbulence on high-order adaptive optics

Author: Nowacki, Hugo, Bouquin, Jean-Baptiste Le, Gouvret, Carole, Marcotto, Aurélie, Robbe-Dubois, Sylvie, Perraut, Karine, Magnard, Yves, Delboulbé, Alain, Stadler, Eric, Guieu, Sylvain, Rochat, Sylvain, and Maurel, Didier
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present an experiment set to address a standard specification aiming at avoiding local turbulence inside the Coud\'e train of telescopes. Namely, every optical surface should be kept within a 1.5$^\circ$ range around ambient temperature. Such a specification represents an important concern and constraint when developing optical systems for astronomy. Our aim was to test its criticality in the context of the development of the VLTI/NAOMI and VLTI/GRAVITY+ adaptive optics. This experiment has been conducted using the hardware of the future Corrective Optics (CO) of GRAVITY+. Optical measurements were performed in order to observe the evolution of turbulence in front of a flat mirror for which the surface temperature was controlled in a range of $22^\circ$ above ambient temperature. A time-dependent analysis of the turbulence was led along with a spatial analysis. This experiment shows no influence of temperature on local turbulence. It should be noted however that this result is only applicable to the very specific geometry described in this paper, which is representative of an adaptive optics (AO) system located inside the Coud\'e train (facing-down mirror heated on its backface).
Published: 2022

3. Experimental test of a 40 cm-long R=100 000 spectrometer for exoplanet characterisation

Author: Bourdarot, Guillaume, Coarer, Etienne Le, Mouillet, David, Correia, Jean-Jacques, Jocou, Laurent, Rabou, Patrick, Carlotti, Alexis, Bonfils, Xavier, Artigau, Etienne, Vallee, Philippe, Doyon, Rene, Forveille, Thierry, Stadler, Eric, Magnard, Yves, and Vigan, Arthur
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: High-resolution spectroscopy is a key element for present and future astronomical instrumentation. In particular, coupled to high contrast imagers and coronagraphs, high spectral resolution enables higher contrast and has been identified as a very powerful combination to characterise exoplanets, starting from giant planets now, up to Earth-like planet eventually for the future instruments. In this context, we propose the implementation of an innovative echelle spectrometer based on the use of VIPA (Virtually Imaged Phased Array, Shirasaki 1996). The VIPA itself is a particular kind of Fabry-Perot interferometer, used as an angular disperser with much greater dispersive power than common diffraction grating. The VIPA is an efficient, small component (3 cm x 2.4 cm), that takes the very advantage of single mode injection in a versatile design. The overall instrument presented here is a proof-of-concept of a compact, high-resolution (R > 80 000) spectrometer, dedicated to the H and K bands, in the context of the project High-Dispersion Coronagrahy developed at IPAG. The optical bench has a foot-print of 40 cm x 26 cm ; it is fed by two Single-Mode Fibers (SMF), one dedicated to the companion, and one to the star and/or to a calibration channel, and is cooled down to 80 K. This communication first presents the scientific and instrumental context of the project, and the principal merit of single-mode operations in high-resolution spectrometry. After recalling the physical structure of the VIPA and its implementation in an echelle-spectrometer design, it then details the optical design of the spectrometer. In conclusion, further steps (integration, calibration, coupling with adaptive optics) and possible optimization are briefly presented. Keywords: Echelle Spectrometer, High Spectral Resolution, Exoplanets, High-Dispersion Coronography, Infrared, Adaptive Optics, SPHERE
Published: 2018
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4. Multiple Star Systems in the Orion Nebula

Author: GRAVITY collaboration, Karl, Martina, Pfuhl, Oliver, Eisenhauer, Frank, Genzel, Reinhard, Grellmann, Rebekka, Habibi, Maryam, Abuter, Roberto, Accardo, Matteo, Amorim, António, Anugu, Narsireddy, Ávila, Gerardo, Benisty, Myriam, Berger, Jean-Philippe, Bland, Nicolas, Bonnet, Henri, Bourget, Pierre, Brandner, Wolfgang, Brast, Roland, Buron, Alexander, Garatti, Alessio Caratti o, Chapron, Frédéric, Clénet, Yann, Collin, Claude, Foresto, Vincent Coudé du, de Wit, Willem-Jan, de Zeeuw, Tim, Deen, Casey, Delplancke-Ströbele, Françoise, Dembet, Roderick, Derie, Frédéric, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Esselborn, Michael, Fédou, Pierre, Finger, Gert, Garcia, Paulo, Dabo, Cesar Enrique Garcia, Lopez, Rebeca Garcia, Gao, Feng, Gandron, Éric, Gillessen, Stefan, Gonté, Frédéric, Gordo, Paulo, Grözinger, Ulrich, Guajardo, Patricia, Guieu, Sylvain, Haguenauer, Pierre, Hans, Oliver, Haubois, Xavier, Haug, Marcus, Haußmann, Frank, Henning, Thomas, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Hubert, Zoltan, Hubin, Norbert, Hummel, Christian A., Jakob, Gerd, Jochum, Lieselotte, Jocou, Laurent, Kaufer, Andreas, Kellner, Stefan, Kandrew, Sarah, Kern, Lothar, Kervella, Pierre, Kiekebusch, Mario, Klein, Ralf, Köhler, Rainer, Kolb, Johan, Kulas, Martin, Lacour, Sylvestre, Lapeyrère, Vincent, Lazareff, Bernard, Bouquin, Jean-Baptiste Le, Léna, Pierre, Lenzen, Rainer, Lévêque, Samuel, Lin, Chien-Cheng, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Mérand, Antoine, Moulin, Thibaut, Müller, Eric, Müller, Friedrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Perrin, Guy, Pflüger, Andreas, Duc, Thanh Phan, Plewa, Philipp M., Popovic, Dan, Rabien, Sebastian, Ramírez, Andrés, Ramos, Jose, Rau, Christian, Riquelme, Miguel, Rodríguez-Coira, Gustavo, Rohloff, Ralf-Rainer, Rosales, Alejandra, Rousset, Gérard, Sanchez-Bermudez, Joel, Scheithauer, Silvia, Schöller, Markus, Schuhler, Nicolas, Spyromilio, Jason, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marcos, Tristram, Konrad R. W., Ventura, Noel, Vincent, Frédéric, Waisberg, Idel, Wank, Imke, Widmann, Felix, Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, and Zins, Gérard
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: This work presents an interferometric study of the massive-binary fraction in the Orion Trapezium Cluster with the recently comissioned GRAVITY instrument. We observe a total of 16 stars of mainly OB spectral type. We find three previously unknown companions for $\theta ^1$ Ori B, $\theta ^2$ Ori B, and $\theta ^2$ Ori C. We determine a separation for the previously suspected companion of NU Ori. We confirm four companions for $\theta ^1$ Ori A, $\theta ^1$ Ori C, $\theta ^1$ Ori D, and $\theta ^2$ Ori A, all with substantially improved astrometry and photometric mass estimates. We refine the orbit of the eccentric high-mass binary $\theta ^1$ Ori C and we are able to derive a new orbit for $\theta ^1$ Ori D. We find a system mass of 21.7 $M_{\odot}$ and a period of $53$ days. Together with other previously detected companions seen in spectroscopy or direct imaging, eleven of the 16 high-mass stars are multiple systems. We obtain a total number of 22 companions with separations up to 600 AU. The companion fraction of the early B and O stars in our sample is about 2, significantly higher than in earlier studies of mostly OB associations. The separation distribution hints towards a bimodality. Such a bimodality has been previously found in A stars, but rarely in OB binaries, which up to this point have been assumed to be mostly compact with a tail of wider companions. We also do not find a substantial population of equal-mass binaries. The observed distribution of mass ratios declines steeply with mass, and like the direct star counts, indicates that our companions follow a standard power law initial mass function. Again, this is in contrast to earlier findings of flat mass ratio distributions in OB associations. We exclude collision as a dominant formation mechanism but find no clear preference for core accretion or competitive accretion., Comment: Accepted for publication in A&A
Published: 2018
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5. Characterisation of ALPAO deformable mirrors for the NAOMI VLTI Auxiliary Telescopes Adaptive Optics

Author: Bouquin, Jean-Baptiste Le, Berger, Jean-Philippe, Beuzit, Jean-Luc, Cottalorda, Eric, Delboulbe, Alain, Egner, Sebastien E., Gonte, Frederic Yves Joseph, Guieu, Sylvain, Haguenauer, Pierre, Jocou, Laurent, Magnard, Yves, Moulin, Thibaut, Rochat, Sylvain, Verinaud, Christophe, and Woillez, Julien
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The Very Large Telescope Interferometer Auxiliary Telescopes will soon be equipped with an adaptive optics system called NAOMI. The corrective optics deformable mirror is the commercial DM241 from ALPAO. Being part of an interferometer operating from visible to mid-infrared, the DMs of NAOMI face several challenges (high level of reliability, open-loop chopping, piston-free control, WFS/DM pupil rotation, high desired bandwidth and stroke). We here describe our extensive characterization of the DMs through measurements and simulations. We summarize the operational scenario we have defined to handle the specific mirror properties. We conclude that the ALPAO DMs have overall excellent properties that fulfill most of the stringent requirements and that deviations from specifications are easily handled. To our knowledge, NAOMI will be the first astronomical system with a command in true Zernike modes (allowing software rotation), and the first astronomical system in which a chopping is performed with the deformable mirror (5'' sky, at 5~Hz).
Published: 2018

6. Upgrading SPHERE with the second-stage adaptive optics system SAXO+: conceptual design of the opto-mechanical module

Author: Jackson, Kathryn J., Schmidt, Dirk, Vernet, Elise, Stadler, Eric, Schreiber, Laura, Cortecchia, Fausto, Lombini, Matteo, Diolaiti, Emiliano, Magnard, Yves, Rabou, Patrick, Rochat, Sylvain, De Rosa, Adriano, Malaguti, Giuseppe, Maurel, Didier, Morgante, Gianluca, Schiavone, Filomena, Terenzi, Luca, Chauvin, Gael, Ferreira, Florian, Gratton, Raffaele, Hubin, Norbert, Kasper, Markus, Langlois, Maud, Le Louarn, Miska, Loupias, Magali, Mazoyer, Johan, Milli, Julien, Mouillet, David, N’Diaye, Mamadou, Rousseau, Sylvain, Tallon, Michel, Vidal, Fabrice, Wildi, François, Zins, Gerard, and Boccaletti, Anthony
Published: 2024
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7. The GRAVITY+ Project: Towards All-sky, Faint-Science, High-Contrast Near-Infrared Interferometry at the VLTI

Author: Collaboration, GRAVITY+, Abuter, Roberto, Alarcon, Patricio, Allouche, Fatme, Amorim, Antonio, Bailet, Christophe, Bedigan, Helen, Berdeu, Anthony, Berger, Jean-Philippe, Berio, Philippe, Bigioli, Azzurra, Blaho, Richard, Boebion, Olivier, Bolzer, Marie-Lena, Bonnet, Henri, Bourdarot, Guillaume, Bourget, Pierre, Brandner, Wolfgang, Cardenas, Cesar, Conzelmann, Ralf, Comin, Mauro, Clénet, Yann, Courtney-Barrer, Benjamin, Dallilar, Yigit, Davies, Ric, Defrère, Denis, Delboulbé, Alain, Delplancke-Ströbele, Françoise, Dembet, Roderick, de Zeeuw, Tim, Drescher, Antonia, Eckart, Andreas, Édouard, Clemence, Eisenhauer, Frank, Fabricius, Maximilian, Feuchtgruber, Helmut, Finger, Gert, Schreiber, Natascha M. Förster, Fuenteseca, Eloy, Garcia, Enrique, Garcia, Paulo, Gao, Feng, Gendron, Eric, Genzel, Reinhard, Gil, Juan Pablo, Gillessen, Stefan, Gomes, Tiago, Gonté, Frédéric, Gouvret, Carole, Guajardo, Patricia, Guidolin, Ivan, Guieu, Sylvain, Guzmann, Ronald, Hackenberg, Wolfgang, Haddad, Nicolas, Hartl, Michael, Haubois, Xavier, Haußmann, Frank, Heißel, Gernot, Henning, Thomas, Hippler, Stefan, Hönig, Sebastian, Horrobin, Matthew, Hubin, Norbert, Jacqmart, Estelle, Jocou, Laurent, Kaufer, Andreas, Kervella, Pierre, Kirchbauer, Jean-Paul, Kolb, Johan, Korhonen, Heidi, Kreidberg, Laura, Krempl, Peter, Lacour, Sylvestre, Lagarde, Stephane, Lai, Olivier, Lapeyrère, Vincent, Laugier, Romain, Bouquin, Jean-Baptiste Le, Leftley, James, Léna, Pierre, Lewis, Steffan, Lutz, Dieter, Magnard, Yves, Mang, Felix, Marcotto, Aurelie, Maurel, Didier, Mérand, Antoine, Millour, Florentin, More, Nikhil, Nowack, Hugo, Nowak, Matthias, Oberti, Sylvain, Olivares, Francisco, Ott, Thomas, Pallanca, Laurent, Paumard, Thibaut, Perraut, Karine, Perrin, Guy, Petrov, Romain, Pfuhl, Oliver, Pourré, Nicolas, Rabien, Sebastian, Rau, Christian, Riquelme, Miguel, Robbe-Dubois, Sylvie, Rochat, Sylvain, Salman, Muhammad, Scherbarth, Malte, Schöller, Markus, Schubert, Joseph, Schuhler, Nicolas, Shangguan, Jinyi, Shchekaturov, Pavel, Shimizu, Taro, Scheithauer, Silvia, Sevin, Arnaud, Soenke, Christian, Soulez, Ferreol, Spang, Alain, Stadler, Eric, Straubmeier, Christian, Sturm, Eckhard, Sykes, Calvin, Tacconi, Linda, Tischer, Helmut, Tristram, Konrad, Vincent, Frédéric, von Fellenberg, Sebastiano, Uysal, Sinem, Widmann, Felix, Wieprecht, Ekkehard, Wiezorrek, Erich, Woillez, Julien, Yazıcı, Şenol, Zins, Gérard, Collaboration, GRAVITY+, Abuter, Roberto, Alarcon, Patricio, Allouche, Fatme, Amorim, Antonio, Bailet, Christophe, Bedigan, Helen, Berdeu, Anthony, Berger, Jean-Philippe, Berio, Philippe, Bigioli, Azzurra, Blaho, Richard, Boebion, Olivier, Bolzer, Marie-Lena, Bonnet, Henri, Bourdarot, Guillaume, Bourget, Pierre, Brandner, Wolfgang, Cardenas, Cesar, Conzelmann, Ralf, Comin, Mauro, Clénet, Yann, Courtney-Barrer, Benjamin, Dallilar, Yigit, Davies, Ric, Defrère, Denis, Delboulbé, Alain, Delplancke-Ströbele, Françoise, Dembet, Roderick, de Zeeuw, Tim, Drescher, Antonia, Eckart, Andreas, Édouard, Clemence, Eisenhauer, Frank, Fabricius, Maximilian, Feuchtgruber, Helmut, Finger, Gert, Schreiber, Natascha M. Förster, Fuenteseca, Eloy, Garcia, Enrique, Garcia, Paulo, Gao, Feng, Gendron, Eric, Genzel, Reinhard, Gil, Juan Pablo, Gillessen, Stefan, Gomes, Tiago, Gonté, Frédéric, Gouvret, Carole, Guajardo, Patricia, Guidolin, Ivan, Guieu, Sylvain, Guzmann, Ronald, Hackenberg, Wolfgang, Haddad, Nicolas, Hartl, Michael, Haubois, Xavier, Haußmann, Frank, Heißel, Gernot, Henning, Thomas, Hippler, Stefan, Hönig, Sebastian, Horrobin, Matthew, Hubin, Norbert, Jacqmart, Estelle, Jocou, Laurent, Kaufer, Andreas, Kervella, Pierre, Kirchbauer, Jean-Paul, Kolb, Johan, Korhonen, Heidi, Kreidberg, Laura, Krempl, Peter, Lacour, Sylvestre, Lagarde, Stephane, Lai, Olivier, Lapeyrère, Vincent, Laugier, Romain, Bouquin, Jean-Baptiste Le, Leftley, James, Léna, Pierre, Lewis, Steffan, Lutz, Dieter, Magnard, Yves, Mang, Felix, Marcotto, Aurelie, Maurel, Didier, Mérand, Antoine, Millour, Florentin, More, Nikhil, Nowack, Hugo, Nowak, Matthias, Oberti, Sylvain, Olivares, Francisco, Ott, Thomas, Pallanca, Laurent, Paumard, Thibaut, Perraut, Karine, Perrin, Guy, Petrov, Romain, Pfuhl, Oliver, Pourré, Nicolas, Rabien, Sebastian, Rau, Christian, Riquelme, Miguel, Robbe-Dubois, Sylvie, Rochat, Sylvain, Salman, Muhammad, Scherbarth, Malte, Schöller, Markus, Schubert, Joseph, Schuhler, Nicolas, Shangguan, Jinyi, Shchekaturov, Pavel, Shimizu, Taro, Scheithauer, Silvia, Sevin, Arnaud, Soenke, Christian, Soulez, Ferreol, Spang, Alain, Stadler, Eric, Straubmeier, Christian, Sturm, Eckhard, Sykes, Calvin, Tacconi, Linda, Tischer, Helmut, Tristram, Konrad, Vincent, Frédéric, von Fellenberg, Sebastiano, Uysal, Sinem, Widmann, Felix, Wieprecht, Ekkehard, Wiezorrek, Erich, Woillez, Julien, Yazıcı, Şenol, and Zins, Gérard
Abstract: The GRAVITY instrument has been revolutionary for near-infrared interferometry by pushing sensitivity and precision to previously unknown limits. With the upgrade of GRAVITY and the Very Large Telescope Interferometer (VLTI) in GRAVITY+, these limits will be pushed even further, with vastly improved sky coverage, as well as faint-science and high-contrast capabilities. This upgrade includes the implementation of wide-field off-axis fringe-tracking, new adaptive optics systems on all Unit Telescopes, and laser guide stars in an upgraded facility. GRAVITY+ will open up the sky to the measurement of black hole masses across cosmic time in hundreds of active galactic nuclei, use the faint stars in the Galactic centre to probe General Relativity, and enable the characterisation of dozens of young exoplanets to study their formation, bearing the promise of another scientific revolution to come at the VLTI., Comment: Published in the ESO Messenger
Published: 2023
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8. On the nightglow polarisation for space weather exploration

Author: Bosse Léo, Lilensten Jean, Gillet Nicolas, Rochat Sylvain, Delboulbé Alain, Curaba Stephane, Roux Alain, Magnard Yves, Johnsen Magnar G., Løvhaug Unni-Pia, Amblard Pierre-Olivier, Le Bihan Nicolas, Nabon Maxime, Marif Hanane, Auriol Frédérique, and Noûs Camille
Subjects: polarisation, aurora, Meteorology. Climatology, QC851-999
Abstract: We present here observations of the polarisation of four auroral lines in the auroral oval and in the polar cusp using a new ground polarimeter called Petit Cru. Our results confirm the already known polarisation of the red line, and show for the first time that the three other lines observed here (namely 557.7 nm, 391.4 nm and 427.8 nm) are polarised as well up to a few percent. We show that in several circumstances, this polarisation is linked to the local magnetic activity and to the state of the ionosphere through the electron density measured with EISCAT. However, we also show that the contribution of light pollution from nearby cities via scattering can not be ignored and can play an important role in polarisation measurements. This series of observations questions the geophysical origin of the polarisation. It also leaves open its relation to the magnetic field orientation and to the state of both the upper atmosphere and the troposphere.
Published: 2020
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9. Impact of local turbulence on high-order adaptive optics

Author: Nowacki, Hugo, primary, Le Bouquin, Jean-Baptiste, additional, Gouvret, Carole, additional, Marcotto, Aurélie, additional, Robbe Dubois, Sylvie, additional, Perraut, Karine, additional, Magnard, Yves, additional, Delboulbé, Alain, additional, Stadler, Eric, additional, Guieu, Sylvain, additional, Rochat, Sylvain, additional, and Maurel, Didier, additional
Published: 2022
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10. SAXO+, a second-stage adaptive optics for SPHERE on VLT: optical and mechanical design concept

Author: Stadler, Eric, primary, Diolaiti, Emiliano, additional, Schreiber, Laura, additional, Cortecchia, Fausto, additional, Lombini, Matteo, additional, Loupias, Magali, additional, Magnard, Yves, additional, De Rosa, Adriano, additional, Malaguti, Giuseppe, additional, Maurel, Didier, additional, Morgante, Gianluca, additional, Rabou, Patrick, additional, Rochat, Sylvain, additional, Schiavone, Filomena, additional, Terenzi, Luca, additional, Vidal, Fabrice, additional, Cantalloube, Faustine, additional, Gendron, Éric, additional, Gratton, Raffaele, additional, Milli, Julien, additional, Mouillet, David, additional, Chauvin, Gaël, additional, Wildi, François, additional, Beuzit, Jean-Luc, additional, and Boccaletti, Anthony, additional
Published: 2022
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11. HARMONI at ELT: system analysis and performance estimation of the high-contrast module

Author: Carlotti, Alexis, primary, Jocou, Laurent, additional, Moulin, Thibaut, additional, Rabou, Patrick, additional, Bidot, Alexis, additional, Hours, Adrien, additional, Magnard, Yves, additional, Delboulbé, Alain, additional, Pancher, Fabrice, additional, Choquet, Élodie, additional, Vigan, Arthur, additional, Houllé, Mathis, additional, Dohlen, Kjetil, additional, Sauvage, Jean-François, additional, Fusco, Thierry, additional, Thatte, Niranjan, additional, Neichel, Benoît, additional, Clarke, Fraser, additional, Melotte, Dave, additional, Tecza, Matthias, additional, and Schnetler, Hermine, additional
Published: 2022
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12. HARMONI at ELT: development of the high-contrast module

Author: Jocou, Laurent, primary, Rabou, Patrick, additional, Moulin, Thibaut, additional, Magnard, Yves, additional, Hours, Adrien, additional, Pancher, Fabrice, additional, Guieu, Sylvain, additional, Carlotti, Alexis, additional, Delboulbé, Alain, additional, Vérove, Maxime, additional, Stadler, Eric, additional, Maurel, Didier, additional, Rochat, Sylvain, additional, Hénault, François, additional, Dohlen, Kjetil, additional, Thatte, Niranjan, additional, Neichel, Benoit, additional, Vola, Pascal, additional, Clarke, Fraser, additional, Melotte, Dave, additional, Tecza, Matthias, additional, and Schnetler, Hermine, additional
Published: 2022
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13. HARMONI at ELT: overview of the capabilities and expected performance of the ELT's first light, adaptive optics assisted integral field spectrograph.

Author: Thatte, Niranjan ., primary, Melotte, Dave, additional, Neichel, Benoit, additional, Le Mignant, David, additional, Bryson, Ian, additional, Clarke, Fraser, additional, Ferraro-Wood, Vanessa, additional, Fusco, Thierry, additional, Gonzalez, Oscar, additional, Schnetler, Hermine, additional, Tecza, Matthias, additional, Wilson, Sandi, additional, Álvarez Urueña, Alonso, additional, Vilaseca, Heribert A., additional, Arribas Mocoroa, Santiago, additional, Carracedo Carballale, Gonzalo José, additional, Crespo, Alejandro, additional, Estrada Piqueras, Alberto, additional, García García, Miriam, additional, Martínez Martín, Cecilia, additional, Pereira Santaella, Miguel, additional, Perna, Michele, additional, Piqueras López, Javier, additional, Bouché, Niolas, additional, Boudon, Didier, additional, Daguisé, Eric, additional, Disseau, Karen, additional, Fensch, Jérémy J., additional, Girardot, Adrien, additional, Guibert, Matthieu, additional, Jarno, Aurélien, additional, Jeanneau, Alexandre, additional, Krogager, Jens-Kristian, additional, Laurent, Florence, additional, Loupias, Magali, additional, Migniau, Jean-Emmanuel, additional, Piqueras, Laure, additional, Remillieux, Alban, additional, Richard, Johan, additional, Pecontal, Arlette, additional, Bardou, Lisa F., additional, Barr, David, additional, Cetre, Sylvain, additional, Deshmukh, Rishi, additional, Dimoudi, Sofia, additional, Dubbledam, Marc, additional, Dunn, Andrew, additional, Gadotti, Dimitra, additional, Guy, Joss J., additional, King, David L., additional, Little, David J., additional, McLeod, Anna, additional, Morris, Simon, additional, Morris, Tim, additional, O'Brien, Kieran S., additional, Ronson, Emily, additional, Smith, Russell, additional, Staykov, Lazar, additional, Swinbank, Mark, additional, Townson, Matthew, additional, Accardo, Matteo, additional, Alvarez Mendez, Domingo, additional, George, Elizabeth, additional, Hopgood, Joshua, additional, Ives, Derek, additional, Mehrgan, Leander, additional, Mueller, Eric, additional, Reyes-Moreno, Javier, additional, Conzelmann, Ralf, additional, Gutierrez Cheetham, Pablo, additional, Alonso-Sánchez, Ángel, additional, Battaglia, Giuseppina, additional, Cagigas Garcia, Miguel Angel, additional, Chulani, Haresh M., additional, Delgado García, Graciela C., additional, Fernández-Izquierdo, Patricia, additional, Fragoso López, Ana Belén, additional, García-Lorenzo, Begoña, additional, Hernández González, Alberto, additional, Hernández Suárez, Elvio, additional, Herreros Linares, Jose Miguel, additional, Joven, Enrique, additional, López López, Roberto, additional, Lujan Gonzalez, Alejandro Antonio, additional, Martín, Yolanda, additional, Mediavilla, Evencio, additional, Menéndez Mendoza, Saúl, additional, Montoya Martínez, Luz Maria, additional, Peñate Castro, José, additional, Pérez, Álvaro, additional, Rasilla, José Luis, additional, Rebolo-López, Rafael, additional, Rodríguez-Ramos, Luis Fernando, additional, Vega Moreno, Afrodisio, additional, Viera-Curbelo, Teodora, additional, Zanon Dametto, Natacha, additional, Carlotti, Alexis, additional, Correia, Jean-Jacques, additional, Curaba, Stéphane, additional, Delboulbé, Alain, additional, Guieu, Sylvain, additional, Hours, Adrien, additional, Hubert, Zoltan, additional, Jocou, Laurent, additional, Magnard, Yves, additional, Moulin, Thibaut, additional, Pancher, Fabrice, additional, Rabou, Patrick, additional, Stadler, Eric, additional, Vérove, Maxime, additional, Contini, Thierry, additional, Larrieu, Marie, additional, Boebion, Olivier, additional, Fantéï-Caujolle, Yan, additional, Lecron, Daniel, additional, Rousseau, Sylvain, additional, Amram, Philippe, additional, Beltramo-Martin, Olivier, additional, Bon, William, additional, Bonnefoi, Anne, additional, Ceria, William, additional, Challita, Zalpha, additional, Charles, Yannick, additional, Choquet, Elodie, additional, Correia, Carlos, additional, Costille, Anne, additional, Dohlen, Kjetil, additional, Ducret, Franck, additional, El Hadi, Kacem, additional, Gach, Jean-Luc, additional, Gimenez, Jean-Luc, additional, Groussin, Olivier, additional, Jaquet, Marc, additional, Jouve, Pierre, additional, Madec, Fabrice, additional, Pedreros Bustos, Felipe, additional, Renault, Edgard, additional, Sanchez, Patrice, additional, Vigan, Arthur, additional, Vola, Pascal, additional, Zavago, Annie, additional, Fétick, Romain, additional, Lim, Caroline, additional, Petit, Cyril, additional, Sauvage, Jean-Francois, additional, Védrenne, Nicolas, additional, Bagci, Fehim Taha, additional, Caldwell, Martin E., additional, Elliott, Ellis, additional, Hiscock, Peter, additional, Johnson, Emma, additional, Nalagatla, Murali, additional, Seitis, Aristea, additional, Wells, Mark, additional, Black, Martin, additional, Bond, Charlotte Z., additional, Brierley, Saskia, additional, Campbell, Kenneth, additional, Campbell, Neil, additional, Carruthers, James, additional, Cochrane, William, additional, Evans, Chris, additional, Harman, Joel, additional, Humphreys, William, additional, Louth, Thomas, additional, Miller, Chris, additional, Montgomery, David, additional, Murali, Meenu, additional, Murray, John, additional, O'Malley, Norman, additional, Sanchez-Janssen, Ruben, additional, Schwartz, Noah, additional, Smith, Patrick, additional, Strachan, Jonathan, additional, Todd, Stephen, additional, Watt, Stuart, additional, Wells, Martyn, additional, Yaqoob, Asim, additional, Bell, Eric, additional, Gnedin, Oleg O., additional, Gultekin, Kayhan, additional, Mateo, Mario, additional, Meyer, Michael, additional, Ahmad, Munadi, additional, Birkby, Jayne, additional, Booth, Michael, additional, Cappellari, Michele, additional, Castillo Dominguez, Edgar, additional, Chao Ortiz, Jorge, additional, Gooding, David, additional, Grisdale, Kearn, additional, Hidalgo Valadez, Andrea, additional, Hogan, Laurence, additional, Kariuki, James, additional, Lewis, Ian, additional, Lowe, Adam, additional, Ozer, Zeynep, additional, Routledge, Laurence, additional, Rigopoulou, Dimitra, additional, and York, Alec, additional
Published: 2022
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14. Performance and Results of the NAOS Visible Wavefront Sensor

Author: Feautrier, Philippe, Dorn, Reinhold J., Rousset, Gérard, Cavadore, Cyril, Charton, Julien, Cumani, Claudio, Fusco, Thierry, Hubin, Norbert, Kern, Pierre, Lizon, Jean-Louis, Magnard, Yves, Puget, Pascal, Rabaud, Didier, Rabou, Patrick, Stadler, Eric, Burton, W. B., editor, Kuijpers, J. M. E., editor, Van Den Heuvel, E. P. J., editor, Van Der Laan, H., editor, Amico, Paola, editor, Beletic, James W., editor, and Beletic, Jenna E., editor
Published: 2004
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15. OCam with CCD220, the Fastest and Most Sensitive Camera to Date for AO Wavefront Sensing

Author: Feautrier, Philippe, Gach, Jean-Luc, Balard, Philippe, Guillaume, Christian, Downing, Mark, Hubin, Norbert, Stadler, Eric, Magnard, Yves, Skegg, Michael, Robbins, Mark, Denney, Sandy, Suske, Wolfgang, Jorden, Paul, Wheeler, Patrick, Pool, Peter, Bell, Ray, Burt, David, Davies, Ian, Reyes, Javier, Meyer, Manfred, Baade, Dietrich, Kasper, Markus, Arsenault, Robin, Fusco, Thierry, and Diaz Garcia, José Javier
Published: 2011
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16. The GRAVITY+ Project: Towards All-sky, Faint-Science, High-Contrast Near-Infrared Interferometry at the VLTI

Author: Collaboration, GRAVITY+, Abuter, Roberto, Alarcon, Patricio, Allouche, Fatme, Amorim, Antonio, Bailet, Christophe, Bedigan, Helen, Berdeu, Anthony, Berger, Jean-Philippe, Berio, Philippe, Bigioli, Azzurra, Blaho, Richard, Boebion, Olivier, Bolzer, Marie-Lena, Bonnet, Henri, Bourdarot, Guillaume, Bourget, Pierre, Brandner, Wolfgang, Cardenas, Cesar, Conzelmann, Ralf, Comin, Mauro, Clénet, Yann, Courtney-Barrer, Benjamin, Dallilar, Yigit, Davies, Ric, Defrère, Denis, Delboulbé, Alain, Delplancke-Ströbele, Françoise, Dembet, Roderick, de Zeeuw, Tim, Drescher, Antonia, Eckart, Andreas, Édouard, Clemence, Eisenhauer, Frank, Fabricius, Maximilian, Feuchtgruber, Helmut, Finger, Gert, Schreiber, Natascha M. Förster, Fuenteseca, Eloy, Garcia, Enrique, Garcia, Paulo, Gao, Feng, Gendron, Eric, Genzel, Reinhard, Gil, Juan Pablo, Gillessen, Stefan, Gomes, Tiago, Gonté, Frédéric, Gouvret, Carole, Guajardo, Patricia, Guidolin, Ivan, Guieu, Sylvain, Guzmann, Ronald, Hackenberg, Wolfgang, Haddad, Nicolas, Hartl, Michael, Haubois, Xavier, Haußmann, Frank, Heißel, Gernot, Henning, Thomas, Hippler, Stefan, Hönig, Sebastian, Horrobin, Matthew, Hubin, Norbert, Jacqmart, Estelle, Jocou, Laurent, Kaufer, Andreas, Kervella, Pierre, Kirchbauer, Jean-Paul, Kolb, Johan, Korhonen, Heidi, Kreidberg, Laura, Krempl, Peter, Lacour, Sylvestre, Lagarde, Stephane, Lai, Olivier, Lapeyrère, Vincent, Laugier, Romain, Bouquin, Jean-Baptiste Le, Leftley, James, Léna, Pierre, Lewis, Steffan, Lutz, Dieter, Magnard, Yves, Mang, Felix, Marcotto, Aurelie, Maurel, Didier, Mérand, Antoine, Millour, Florentin, More, Nikhil, Nowack, Hugo, Nowak, Matthias, Oberti, Sylvain, Olivares, Francisco, Ott, Thomas, Pallanca, Laurent, Paumard, Thibaut, Perraut, Karine, Perrin, Guy, Petrov, Romain, Pfuhl, Oliver, Pourré, Nicolas, Rabien, Sebastian, Rau, Christian, Riquelme, Miguel, Robbe-Dubois, Sylvie, Rochat, Sylvain, Salman, Muhammad, Scherbarth, Malte, Schöller, Markus, Schubert, Joseph, Schuhler, Nicolas, Shangguan, Jinyi, Shchekaturov, Pavel, Shimizu, Taro, Scheithauer, Silvia, Sevin, Arnaud, Soenke, Christian, Soulez, Ferreol, Spang, Alain, Stadler, Eric, Straubmeier, Christian, Sturm, Eckhard, Sykes, Calvin, Tacconi, Linda, Tischer, Helmut, Tristram, Konrad, Vincent, Frédéric, von Fellenberg, Sebastiano, Uysal, Sinem, Widmann, Felix, Wieprecht, Ekkehard, Wiezorrek, Erich, Woillez, Julien, Yazıcı, Şenol, and Zins, Gérard
Subjects: FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract: The GRAVITY instrument has been revolutionary for near-infrared interferometry by pushing sensitivity and precision to previously unknown limits. With the upgrade of GRAVITY and the Very Large Telescope Interferometer (VLTI) in GRAVITY+, these limits will be pushed even further, with vastly improved sky coverage, as well as faint-science and high-contrast capabilities. This upgrade includes the implementation of wide-field off-axis fringe-tracking, new adaptive optics systems on all Unit Telescopes, and laser guide stars in an upgraded facility. GRAVITY+ will open up the sky to the measurement of black hole masses across cosmic time in hundreds of active galactic nuclei, use the faint stars in the Galactic centre to probe General Relativity, and enable the characterisation of dozens of young exoplanets to study their formation, bearing the promise of another scientific revolution to come at the VLTI., Comment: Published in the ESO Messenger
Published: 2022
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17. NanoCarb spaceborne miniaturized GHG sensor: first experimental results

Author: Gousset, Silvère, primary, Rodrigo, Juana M., additional, Le Coarer, Etienne, additional, Ehrhardt, Hélène, additional, Stadler, Eric, additional, Hubert, Zoltán, additional, Magnard, Yves, additional, Croizé, Laurence, additional, Ferrec, Yann, additional, de la Barrière, Florence, additional, Domel, Roland, additional, Coudrain, Christophe, additional, Gouyon, Remi, additional, Chambon, Mathieu, additional, Perrault, Philippe, additional, Boussey, Jumana, additional, Gourgon, Cécile, additional, Panabière, Marie, additional, and Gerges, Nadine, additional
Published: 2021
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18. HARMONI: first light spectroscopy for the ELT: instrument final design and quantitative performance predictions

Author: Thatte, Niranjan, primary, Bryson, Ian, additional, Clarke, Fraser, additional, Ferraro-Wood, Vanessa, additional, Fusco, Thierry, additional, Le Mignant, David, additional, Melotte, Dave J., additional, Neichel, Benoit, additional, Schnetler, Hermine, additional, Tecza, Matthias, additional, Arribas, Santiago, additional, Crespo, Alejandro, additional, Estrada Piqueras, Alberto, additional, García García, Miriam, additional, Pereira Santaella, Miguel, additional, Piqueras López, Javier, additional, Blaizot, Jeremy, additional, Bouché, Nicholas, additional, Boudon, Didier, additional, Chapuis, Diane, additional, Daguise, Eric, additional, Disseau, Karen, additional, Guibert, Mtthieu, additional, Jarno, Aurelien, additional, Jeanneau, Alexandre, additional, Laurent, Florence, additional, Loupias, Magali, additional, Migniau, Jean-Emmanuel, additional, Piqueras, Laure, additional, Remillieux, Alban, additional, Richard, Johan, additional, Pécontal-Rousset, Arlette, additional, Bardou, Lisa, additional, Close, Madeline M., additional, Deshmukh, Rishi, additional, Dimoudi, Sofia, additional, Dubbledam, Marc, additional, King, David, additional, Morris, Simon, additional, Morris, Timothy J., additional, O'Brien, Kieran S., additional, Staykov, Lazar, additional, Swinbank, Mark, additional, Townson, Matthew, additional, Younger, Eddy, additional, Accardo, Matteo, additional, Avarez Mendez, Domingo, additional, Conzelmann, Ralf, additional, Egner, Sebastian, additional, George, Elizabeth M., additional, Gonté, Frederic, additional, Hopgood, Joshua, additional, Ives, Derek, additional, Mehrgan, Leander, additional, Mueller, Eric, additional, Peroux, Celine, additional, Vernet, Joel, additional, Alonso-Sánchez, Ángel, additional, Giuseppina, Battaglia, additional, Cagigas, Miguel, additional, Delgado, Jose Miguel, additional, Fernandez Izquierdo, Patricia, additional, Fragoso López, Ana Belén, additional, García-Lorenzo, Maria Begoña, additional, Hernandez Suarez, Elvio, additional, Herreros Linares, José Miguel, additional, Joven, Enrique, additional, López, Roberto, additional, Martín Hernando, Yolanda, additional, Mediavilla, Evencio, additional, Monreal, Ana, additional, Peñate Castro, José, additional, Rasilla, Jose Luis, additional, Rebolo, Rafael, additional, Rodríguez-Ramos, Luis Fernando, additional, Vega Moreno, Afrodisio, additional, Viera, Teodora, additional, Carlotti, Alexis, additional, Correia, Jean-Jacques, additional, Delboulbe, Alain, additional, Guieu, Sylvain, additional, Hours, Adrien, additional, Hubert, Zoltan, additional, Jocou, Laurent, additional, Magnard, Yves, additional, Moulin, Thibaut, additional, Pancher, Fabrice, additional, Rabou, Patrick, additional, Stadler, Eric, additional, Contini, Thierry, additional, Larrieu, Marie, additional, Fantei-Caujolle, Yan, additional, Lecron, Daniel, additional, Rousseau, Sylvain, additional, Beltramo-Martin, Olivier, additional, Bon, William, additional, Bonnefoi, Anne, additional, Ceria, William, additional, Choquet, Elodie, additional, Correia, Carlos, additional, Costille, Anne, additional, Dohlen, Kjetil, additional, Ducret, Franck, additional, El Hadi, Kacem, additional, Epinat, Benoit, additional, Fetick, Romain, additional, Gach, Jean-Luc, additional, Groussin, Oliver, additional, Jaafar, Issa, additional, Le Merrer, Joel, additional, Llored, Marc, additional, Pedreros, Felipe, additional, Renault, Edgard, additional, Sanchez, Patrice, additional, Vigan, Arthur, additional, Vola, Pascal, additional, Lim, Caroline, additional, Vedrenne, Nicola, additional, Petit, Cyril, additional, Sauvage, Jean-Francois, additional, Bagci, Taha, additional, Cann, Nick, additional, Chao Ortiz, Jorge, additional, Elliott, Ellis, additional, Seitis, Tea, additional, Tosh, Ian, additional, Anderson, Josh, additional, Black, Martin, additional, Bond, Charlotte, additional, Born, Andy J., additional, Campbell, Kenny, additional, Campbell, Neil, additional, Carruthers, James, additional, Cochrane, William, additional, Dobson, Naomi, additional, Evans, Chris J., additional, Gallie, Angus, additional, Gonzalez, Oscar, additional, Harman, Joel, additional, Henry, David M., additional, Humphreys, William, additional, Louth, Tom, additional, Miller, Chris, additional, Montgomery, David M., additional, Murray, John, additional, O'Malley, Norman, additional, Ritchie, Lynn, additional, Sanchez-Janssen, Ruben, additional, Schwartz, Noah, additional, Smith, Patrick, additional, Watt, Stuart, additional, Wells, Martyn, additional, Wilson, Sandi, additional, Gultekin, Kayhan K., additional, Mateo, Mario L., additional, Meyer, Michael, additional, Valluri, Monica, additional, Ahmad, Munadi, additional, Booth, Michael, additional, Capone, John I., additional, Cappellari, Michele, additional, Gooding, David, additional, Grisdale, Kearn, additional, Hidalgo, Andrea, additional, Kariuki, James, additional, Lewis, Ian, additional, Lowe, Adam, additional, Lynn, Jim, additional, Menduina, Alvaro, additional, Ozer, Zeynep, additional, Preece, Roy, additional, Rigopoulou, Dimitra, additional, Rodrigues, Myriam, additional, and Routledge, Laurence, additional
Published: 2020
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19. VLTI status update: tapping into a powerful second-generation instrumentation

Author: Haubois, Xavier, primary, Abuter, Roberto, additional, Aller-Carpentier, Emmanuel, additional, Alonso, Jaime, additional, Beltran, Juan, additional, Berger, Jean-Philippe, additional, Bourget, Pierre, additional, Bristow, Paul, additional, Caniguante, Luis, additional, Chazelas, Bruno, additional, Cid, Claudia, additional, Conzelmann, Ralf D., additional, Cortes, Angela, additional, Darré, Pascaline, additional, Delboulbe, Alain, additional, Delplancke-Ströbele, Françoise, additional, Del Valle, Diego, additional, Dembet, Roderick, additional, Donoso, Reinaldo, additional, Dupuy, Christophe, additional, Egner, Sébastien E., additional, Eisenhauer, Frank, additional, Faundez, Lorena, additional, Fuenteseca, Eloy, additional, Frahm, Robert, additional, Gaytan, Daniel, additional, Gil, Juan Pablo, additional, Glindemann, Andreas, additional, Gonté, Frédéric Yves J., additional, Gonzales, Jaime, additional, Guajardo, Patricia, additional, Guerlet, Thibaut, additional, Guieu, Sylvain, additional, Gutierrez, Pablo, additional, Haguenauer, Pierre, additional, Vanderheyden, Pierre, additional, Huber, Stefan, additional, Hubin, Norbert, additional, Hummel, Christian A., additional, Jochum, Lieselotte, additional, Jocou, Laurent, additional, Kirchbauer, Jean-Paul, additional, Kolb, Johann, additional, Kosmalski, Johan, additional, Krempl, Peter, additional, Lacour, Sylvestre, additional, Le Bouquin, Jean-Baptiste, additional, Leclercq, Julien, additional, Lizon, Jean-Louis, additional, Lopez, Bruno, additional, Magnard, Yves, additional, Meilland, Anthony, additional, Meister, Alexander, additional, Mérand, Antoine, additional, Mieske, Steffen, additional, Moulin, Thibaut, additional, Osorio, Juan, additional, Ott, Jürgen, additional, Paladini, Claudia, additional, Pallanca, Laurent, additional, Pavez, Marcus, additional, Pasquini, Luca, additional, Pelluet, Célia, additional, Percheron, Isabelle, additional, Pettazzi, Lorenzo, additional, Pino Pavez, Andres, additional, Poupar, Sebastien, additional, Ramírez, Andres F., additional, Reyes-Moreno, Javier, additional, Riquelme, Miguel, additional, Rivinius, Thomas, additional, Rochat, Sylvain, additional, Salgado, Fernando, additional, Schoeller, Markus, additional, Schuhler, Nicolas, additional, Shchekaturov, Pavel, additional, Stephan, Christian, additional, Suárez Valles, Marcos, additional, Smette, Alain, additional, Tamblay, Richard, additional, Tapia, Mario, additional, Tristram, Konrad R. W., additional, Valdes, Guillermo, additional, Verinaud, Christophe, additional, Wittkowski, Markus, additional, Woillez, Julien, additional, and Zins, Gérard, additional
Published: 2020
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20. Impact of local turbulence on high-order adaptive optics

Author: Schreiber, Laura, Schmidt, Dirk, Vernet, Elise, Nowacki, Hugo, Le Bouquin, Jean-Baptiste, Gouvret, Carole, Marcotto, Aurélie, Robbe-Dubois, Sylvie, Perraut, Karine, Magnard, Yves, Delboulbé, Alain, Stadler, Eric, Guieu, Sylvain, Rochat, Sylvain, and Maurel, Didier
Published: 2022
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21. HARMONI at ELT: system analysis and performance estimation of the high-contrast module

Author: Schreiber, Laura, Schmidt, Dirk, Vernet, Elise, Carlotti, Alexis, Jocou, Laurent, Moulin, Thibaut, Rabou, Patrick, Bidot, Alexis, Hours, Adrien, Magnard, Yves, Delboulbé, Alain, Pancher, Fabrice, Choquet, Élodie, Vigan, Arthur, Houlé, Matthis, Dohlen, Kjetil, Sauvage, Jean-François, Fusco, Thierry, Thatte, Niranjan, Neichel, Benoit, Clarke, Fraser, Melotte, Dave, Tecza, Matthias, and Schnetler, Hermine
Published: 2022
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22. SAXO+, a second-stage adaptive optics for SPHERE on VLT: optical and mechanical design concept

Author: Schreiber, Laura, Schmidt, Dirk, Vernet, Elise, Stadler, Eric, Diolaiti, Emiliano, Schreiber, Laura, Cortecchia, Fausto, Lombini, Matteo, Loupias, Magali, Magnard, Yves, De Rosa, Adriano, Malaguti, Giuseppe, Maurel, Didier, Morgante, Gianluca, Rabou, Patrick, Rochat, Sylvain, Schiavone, Filomena, Terenzi, Luca, Vidal, Fabrice, Cantalloube, Faustine, Gendron, Eric, Gratton, Raffaele, Milli, Julien, Mouillet, David, Chauvin, Gael, Wildi, François, Beuzit, Jean-Luc, and Boccaletti, Anthony
Published: 2022
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23. HARMONI at ELT: development of the high-contrast module

Author: Schreiber, Laura, Schmidt, Dirk, Vernet, Elise, Jocou, Laurent, Rabou, Patrick, Moulin, Thibaut, Magnard, Yves, Hours, Adrien, Pancher, Fabrice, Guieu, Sylvain, Carlotti, Alexis, Delboulbé, Alain, Vérove, Maxime, Stadler, Eric, Maurel, Didier, Rochat, Sylvain, Henault, François, Dohlen, K., Thatte, N., Neichel, B., Vola, P., Clarke, F., Melotte, D., Tecza, M., and Schnetler, H.
Published: 2022
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24. Bringing the New Adaptive Optics Module for Interferometry (NAOMI) into Operation

Author: Gonté, Frédéric, Abad, Jose Antonio, Abuter, Roberto, Aller Carpentier, Emmanuel, Alonso, Jaime, Andofalto, Luigi, Barriga, Pablo, Berger, Jean-Philippe, Beuzit, Jean-Luc, Blanchard, Israel, Bonnet, Henri, Bourdarot, Guillaume, Bourget, Pierre, Brast, Roland, Bristow, Paul, Caniguante, Luis, Cerda, Susana, Cid, Claudia, Correa, Alex, Cottalorda, Eric, Courtney-Barrer, Benjamin, Darré, Pascaline, Delabre, Bernard, Delboulbé, Alain, Dembet, Roderick, Donaldson, Ronald, Dorn, Reinhold, Dupeyron, Jorge, Dupuy, Christophe, Egner, Sebastian, Eisenhauer, Frank, Faundez, Lorena, Fedrigo, Enrico, Fischer, Gerhard, Frank, Christoph, Fuenteseca, Eloy, Gitton, Philippe, Guerlet, Thibaut, Guieu, Sylvain, Gutierrez, Pablo, Haguenauer, Pierre, Haimerl, Andreas, Haubois, Xavier, Heritier, Cédric, Huber, Stefan, Hubin, Norbert, Jolley, Paul, Jocou, Laurent, Kirchbauer, Jean-Paul, Kolb, Johann, Kosmalski, Johan, Krempl, Peter, La Fuente, Carlos, Le Bouquin, Jean-Baptiste, Le Louarn, Miska, Lilley, Paul, Lopez, Bruno, Lopez, Marcelo, Magnard, Yves, Marchetti, Enrico, Mclay, Stewart, Meilland, Anthony, Meister, Alexander, Mérand, Antoine, Moulin, Thibaut, Pasquini, Luca, Paufique, Jérôme, Percheron, Isabelle, Pettazzi, Lorenzo, Pfuhl, Oliver, Phan, Duc, Pino, Andres, Pirani, Werther, Quentin, Jutta, Rakich, Andrew, Ramirez, Andrés, Ridings, Robert, Riedel, Mario, Reyes, Javier, Rochat, Sylvain, Sanchez, Juan, Santos Tomás, Gonsalo, Schmid, Christian, Shchekaturov, Pavel, Schuhler, Nicolas, Seidel, Matthias, Soenke, Christian, Stadler, Eric, Stephan, Christian, Suárez, Marcos, Todorović, Mirko, Valdes, Guillermo, Verinaud, Cristophe, Woillez, Julien, Zins, Gérard, and Zúñiga-Fernández, Sebastian
Abstract: NAOMI was developed by a consortium composed of IPAG and ESO. Its Provisional Acceptance Chile review was held in April 2019. The NAOMI systems that have been installed on the Auxiliary Telescopes make the Very Large Telescope Interferometer (VLTI) and its instruments much less dependent on the atmospheric and dome seeing conditions. NAOMI increases the interferometer’s operability and improves the performance of its instruments and, very early on, was identified as being critical to the VLTI. In this article, we review the project, describe its principles and architecture, and offer a preview of the improvements it brings to VLTI instruments., Published in The Messenger vol. 177, pp. 19-23, September 2019.
Published: 2019
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25. GRAVITY+ adaptive optics (GPAO) tests in Europe

Author: Kammerer, Jens, Sallum, Stephanie, Sanchez-Bermudez, Joel, Millour, Florentin, Bourdarot, Guillaume, Le Bouquin, Jean-Baptiste, Berdeu, Anthony, Houllé, Mathis, Berio, Philippe, Paumard, Thibaut, Defrère, Denis, Garcia, Paulo, Soulez, Ferreol, Hoenig, Sebastian, Allouche, Fatmé, Bachbucher, Martin, Bailet, Christophe, Blanchard, Cyrille, Boebion, Olivier, Bonnet, Henri, Brara, Amit, Carbillet, Marcel, Czempiel, Stephan, Delboulbé, Alain, Dembet, Roderick, Edouard, Clémence, Eisenhauer, Frank, Feuchtgruber, Helmut, Furchstsam, Christoph, Gillessen, Stefan, Goldbrunner, Armin, Gomes, Tiago, Gouvvret, Carole, Guieu, Sylvain, Hartl, Mike, Hartwig, Johannes, Haussmann, Frank, Huber, David, Ibn Taïeb, Ihsan, Kolb, Johann, Lagarde, Stéphane, Lai, Olivier, Leftley, James, Lutz, Dieter, Magnard, Yves, Marcotto, Aurélie, Nowacki, Hugo, Oberti, Sylvain, Ott, Thomas, Rau, Christian, Robbe-Dubois, Sylvie, Scigliuto, Jules, Soller, Franz, Shchekaturov, Pavel, Schuppe, Daniel, Stadler, Eric, Uysal, Sinem, Widmann, Felix, Wieprecht, Ekherhard, Woillez, Julien, and Yazici, Şenol
Published: 2024
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26. MORFEO at ELT: the adaptive optics module for ELT

Author: Jackson, Kathryn J., Schmidt, Dirk, Vernet, Elise, Ciliegi, Paolo, Agapito, Guido, Aliverti, Matteo, Annibali, Francesca, Aridiacono, Carmelo, Azzaroli, Nicolò, Balestra, Andrea, Baronchelli, Ivano, Ballone, Alessandro, Baruffolo, Andrea, Battaini, Federico, Benedetti, Simone, Bergomi, Maria, Bianco, Andrea, Bonaglia, Marco, Briguglio, Runa, Busoni, Lorenzo, Cantiello, Michele, Capasso, Giulio, Carlà, Giulia, Carolo, Elena, Cascone, Enrico, Chauvin, Gaël, Chebbo, Manal, Chinellato, Simonetta, Cianniello, Vincenzo, Colapietro, Mirko, Correia, Jean-Jacques, Cosentino, Giuseppe, Costa, Elia, D'Auria, Domenico, De Caprio, Vincenzo, Devaney, Nicholas, Di Antonio, Ivan, Di Cianno, Amico, Di Dato, Andrea, Di Filippo, Simone, Di Francesco, Benedetta, Di Giammatteo, Ugo, Di Prospero, Chiara, Di Rico, Gianluca, Di Rocco, Andrea, Diretto, Daphne, Dolci, Mauro, Eredia, Christian, Esposito, Simone, Fantinel, Daniela, Farinato, Jacopo, Feautrier, Philippe, Foppiani, Italo, Genoni, Matteo, Giro, Enrico, Gluck, Laurence, Goncharov, Alexander, Grani, Paolo, Greggio, Davide, Guieu, Sylvain, Gullieuszik, Marco, Hubert, Zoltan, Jocou, Laurent, Lampitelli, Salvatore, Lapucci, Tommaso, Laudisio, Fulvio, Leal, Vincent, Magnard, Yves, Magrin, Demetrio, Malone, Deborah, Marafatto, Luca, Michel, Christophe, Mouillet, David, Moulin, Thibaut, Munari, Matteo, Oberti, Sylvain, Pancher, Fabrice, Pariani, Giorgio, Petrella, Amedeo, Pinnard, Laurent, Plantet, Cedric, Portaluri, Elisa, Puglisi, Alfio, Rabou, Patrick, Radhakrishnan, Kalyan, Ragazzoni, Roberto, Redaelli, Edoardo Maria Alberto, Riva, Marco, Rochat, Sylvain, Rodeghiero, Gabriele, Rosignoli, Luca, Salasnich, Bernardo, Savarese, Salvatore, Scalera, Marcello, Schipani, Pietro, Selvestrel, Danilo, Sassolas, Benoit, Sordo, Rosanna, Teodori, Ludovico, Umbriaco, Gabriele, Valentini, Angelo, and Xompero, Marco
Published: 2024
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27. HARMONI at ELT: project status and instrument overview

Author: Bryant, Julia J., Motohara, Kentaro, Vernet, Joël R. D., Thatte, Niranjan A., Melotte, Dave, Neichel, Benoit, Le Mignant, David, Rees, Phil, Clarke, Fraser, Ferraro-Wood, Vanessa, Gonzalez, Oscar, Jones, Maia, Álvarez Urueña, Alonso, Argelaguet Vilaseca, Heribert, Arribas Mocoroa, Santiago, Caballero, José Antonio, Carracedo Carballal, Gonzalo José, Estrada Piqueras, Alberto, Ferro, Irene, García García, Miriam, Lamperti, Isabella, Pereira Santaella, Miguel, Perna, Michele, Piqueras Lopez, Javier, Bouché, Nicolas, Boudon, Didier, Daguise, Eric, Domenis, Nicola, Fensch, Jérémy, Olivier Flasseur, Olivier, Giroud, Rémi, Guibert, Matthieu, Jarno, Aurelien, Jeanneau, Alexandre, Krogager, Jens-Kristian, Langlois, Maud, Laurent, Florence, Loupias, Magali, Migniau, Jean-Emmanuel, Nguyen, Dieu, Piqueras, Laure, Remillieux, Alban, Richard, Johan, Pecontal, Arlette, Bardou, Lisa, Barr, David, Cetre, Sylvain, Dimoudi, Sofia, Dubbeldam, Marc, Dunn, Andrew, Gadotti, Dimitri, Guy, Joss, King, David, McLeod, Anna, Morris, Simon, Morris, Tim, O'Brien, Kieran, Ronson, Emily, Smith, Russell, Staykov, Lazar, Swinbank, Mark, Accardo, Matteo, Alvarez Mendez, Domingo, Fuerte Rodriguez, Pablo Alberto, George, Elizabeth, Ives, Derek, Mehrgan, Leander, Mueller, Eric, Reyes, Javier, Conzelmann, Ralf, Gutierrez Cheetham, Pablo, Alonso Sanchez, Angel, Battaglia, Giuseppina, Cagigas, Miguel, Castro-Almazán, Julio A., Chulani, Haresh, Delgado-García, Graciela, Fernandez Izquierdo, Patricia, Esparza-Arredondo, Donaji, García-Lorenzo, Begoña, Hernández González, Alberto, Hernández Suárez, Elvio, Licandro, Javier, Joven, Enrique, López López, Roberto, Lujan Gonzalez, Alejandro Antonio, Martín Hernando, Yolanda, Martín-Navarro, Ignacio, Mediavilla, Evencio, Menéndez Mendoza, Saúl, Montoya Martínez, Luz Maria, Peñate Castro, José, Murgas, Felipe, Pallé, Enric, Pérez, Álvaro, Rasilla, Jose Luis, Rebolo, Rafael, Rodríguez, Horacio, Rodríguez Ramos, Luis Fernando, Sánchez Béjar, Victor, Shahbaz, Tariq, Vega Moreno, Afrodisio, Viera, Teodora, Bonnefoy, Mickaël, Bret, Tony, Carlotti, Alexis, Correia, Jean-Jacques, Curaba, Stéphane, Delboulbé, Alain, Guieu, Sylvain, Hours, Adrien, Hubert, Zoltan, Jocou, Laurent, Magnard, Yves, Michaud, Laurence, Moulin, Thibaut, Pancher, Fabrice, Rabou, Patrick, Rochat, Sylvain, Stadler, Eric, Contini, Thierry, Larrieu, Marie, Mamessier, Sébastien, Boebion, Olivier, Fantei-Caujolle, Yan, Lecron, Daniel, Amram, Philippe, Blanchard, Patrick, Bon, William, Bonnefoi, Anne, Bozier, Alexandre, Ceria, William, Challita, Zalpha, Charles, Yannick, Choquet, Elodie, Costille, Anne, Delsanti, Audrey, Dohlen, Kjetil, Ducret, Franck, El Hadi, Kacem, Foulon, Benjamin, Gimenez, Jean-Luc, Groussin, Olivier, Jaquet, Marc, Renault, Edgard, Rouquette, Paul, Sanchez, Patrice, Vigan, Arthur, Zavagno, Annie, Fétick, Romain, Fusco, Thierry, Héritier, Cedric, Sauvage, Jean-Francois, Vedrenne, Nicolas, Aksoy, Demet, Caldwell, Martin, Fitzpatrick, Ann, Geddert, Carl, Hiscock, Peter, Johnson, Emma, Nalagatla, Murali, Saraff, Louise, Shreeves, Joe, Tildesley, Matthew, Wells, Mark, Aretos, Anastasios, Barrett, Lee, Black, Martin, Bond, Charlotte, Brierley, Saskia, Bryson, Ian, Calderhead, Amelia, Campbell, Kenny, Carruthers, James, Chapman, Lee, Cochrane, William, Gillespie, Rory, Harman, Joel, Harvey, Douglas, Harvey, Eamonn, Johnson, Bethany, Louth, Tom, MacIntosh, Mike, MacIver, Anna, Miller, Chris, Montgomery, David, Murali, Meenu, Murray, John, O'Malley, Norman, Sanchez-Janssen, Ruben, Schwartz, Noah, Smith, Patrick, Strachan, Jonathan, Todd, Stephen, Wasley, Dawn, Wilson, Sandi, Zhou, Junyi, Bell, Eric, Gnedin, Oleg, Gultekin, Kayhan, Mateo, Mario, Meyer, Michael, Birkby, Jayne, Boland, Liam, Cappellari, Michele, Castillo Dominguez, Edgar, Gooding, David, Grisdale, Kearn, Hidalgo, Andrea, Kariuki, James, Lewis, Ian, McCall, Kieran, Meyer, R. Elliot, Muslimov, Eduard, Lowe, Adam, Ozer, Zeynep, Paszynska, Sophie, Rigopoulou, Dimitra, Tecza, Matthias, and York, Alec
Published: 2024
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28. Imagerie spectro-interférométrique du noyau de η Car avec l'instrument GRAVITY : images de la zone de collision de vent dans les raies Br γ et He I avec une résolution de la milli-seconde d'arc

Author: Sanchez-Bermudez, Joel, Weigelt, Gerd, Bestenlehner, Joachim M., Kervella, Pierre, Brandner, Wolfgang, Henning, Thomas, Müller, André, Perrin, Guy, Pott, Jorg-Uwe, Schöller, Markus, Van Boekel, Roy, Abuter, Roberto, Accardo, Matteo, Amorim, Antonio, Anugu, Narsireddy, Avila, Gerardo, Benisty, Myriam, Berger, Jean-Philippe, Blind, Nicolas, Bonnet, Henri, Bourget, Pierre, Brast, Roland, Buron, Alexander, Cantalloube, Faustine, Caratti O Garatti, Alessio, Cassaing, Frederic, Chapron, Frédéric, Choquet, Élodie, Clenet, Yann, Collin, Claude, Coude Du Foresto, Vincent, de Wit, Willem-Jan, De Zeeuw, Tim, Deen, Casey, Delplancke-Ströbele, Françoise, Dembet, Roderick, Derie, Frédéric, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Eisenhauer, Frank, Esselborn, Michael, Fédou, Pierre, Garcia, Paulo J. V., Garcia-Dabo, Cesar Enrique, Garcia Lopez, Rebeca, Gao, Feng, Gendron, Eric, Genzel, Reinhard, Gillessen, Stefan, Haubois, Xavier, Haug, Marcus, Haussmann, Frank, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Huber, Zoltan, Hubin, Norbert, Hummel, Christian A., Jakob, Gerd, Jochum, Lieselotte, Jocou, Laurent, Karl, Martina, Kaufer, Andreas, Kellner, Stefan, Kendrew, Sarah, Kern, Lothar, Kiekebusch, Mario, Klein, Ralf, Kolb, Johann, Kulas, Martin, Lacour, Sylvestre, Lapeyrère, Vincent, Lazareff, Bernard, Le Bouquin, Jean-Baptiste, Léna, Pierre, Lenzen, Rainer, Lévêque, Samuel, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Mellein, Marcus, Mérand, Antoine, Moreno-Ventas, Javier, Moulin, Thibaut, Muller, Ewald, Muller, Friedrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Petrucci, Pierre-Olivier, Pflüger, Andreas, Pfuhl, Oliver, Duc, Thanh Phan, Plewa, Philipp M., Popovic, Dan, Rabien, Sebastian, Ramirez, Andres, Ramos, Jose Ricardo, Rau, Christian, Riquelme, Miguel, Rodríguez-Coira, Gustavo, Rohloff, Ralf-Rainer, Rosales, Alejandra, Rousset, Gérard, Scheithauer, Silvia, Schuhler, Nicolas, Spyromilio, Jason, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marco, Tristram, Konrad R. W., Ventura, Noel, Vincent, Frédéric, Waisberg, Idel, Wank, Imke, Widmann, Felix, Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, Zins, Gerard, Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, European Southern Observatory [Santiago] (ESO), European Southern Observatory (ESO), Max-Planck-Institut für Radioastronomie (MPIFR), University of Sheffield [Sheffield], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Universidad de Santiago de Chile [Santiago] (USACH), CENTRA Instituto Superior Tecnico, Universidade de Lisboa (ULISBOA), University of Exeter, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève (UNIGE), Max Planck Institute for Extraterrestrial Physics (MPE), Dublin Institute for Advanced Studies (DIAS), DOTA, ONERA, Université Paris Saclay [Châtillon], ONERA-Université Paris-Saclay, Leiden University, Physikalisches Institut [Köln], Universität zu Köln, Max Planck Institute for Radio Astronomy, Universidade do Porto [Porto], Instituto Superior Técnico, Technical University of Lisbon, Lawrence Berkeley National Laboratory [Berkeley] (LBNL), European Space Agency (Baltimore) Space Telescope Science Institute (ESA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), DOTA, ONERA, Université Paris Saclay (COmUE) [Châtillon], ONERA-Université Paris Saclay (COmUE), Universidade do Porto, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: INSTRUMENTATION: HAUTE RESOLUTION ANGULAIRE, IMAGERIE STELLAIRE, BINARY STAR, MASS LOSS, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, HIGH ANGULAR RESOLUTION, INSTRUMENTATION: INTERFEROMETRES, ETOILE: PERTE DE MASSE, STAR IMAGING, INTERFEROMETER, ETOILES BINAIRES, MASSIVE STAR, ETOILES MASSIVES
Abstract: International audience; Context. η Car is one of the most intriguing luminous blue variables in the Galaxy. Observations and models of the X-ray, ultraviolet, optical, and infrared emission suggest a central binary in a highly eccentric orbit with a 5.54 yr period residing in its core. 2D and 3D radiative transfer and hydrodynamic simulations predict a primary with a dense and slow stellar wind that interacts with the faster and lower density wind of the secondary. The wind-wind collision scenario suggests that the secondary’s wind penetrates the primary’s wind creating a low-density cavity in it, with dense walls where the two winds interact. However, the morphology of the cavity and its physical properties are not yet fully constrained.Aims. We aim to trace the inner ∼5–50 au structure of η Car’s wind-wind interaction, as seen through Brγ and, for the first time, through the He I 2s-2p line.Methods. We have used spectro-interferometric observations with the K-band beam-combiner GRAVITY at the VLTI. The analyses of the data include (i) parametrical model-fitting to the interferometric observables, (ii) a CMFGEN model of the source’s spectrum, and (iii) interferometric image reconstruction.Results. Our geometrical modeling of the continuum data allows us to estimate its FWHM angular size close to 2 mas and an elongation ratio ϵ = 1.06 ± 0.05 over a PA = 130° ± 20°. Our CMFGEN modeling of the spectrum helped us to confirm that the role of the secondary should be taken into account to properly reproduce the observed Brγ and He I lines. Chromatic images across the Brγ line reveal a southeast arc-like feature, possibly associated to the hot post-shocked winds flowing along the cavity wall. The images of the He I 2s-2p line served to constrain the 20 mas (∼50 au) structure of the line-emitting region. The observed morphology of He I suggests that the secondary is responsible for the ionized material that produces the line profile. Both the Brγ and the He I 2s-2p maps are consistent with previous hydrodynamical models of the colliding wind scenario. Future dedicated simulations together with an extensive interferometric campaign are necessary to refine our constraints on the wind and stellar parameters of the binary, which finally will help us predict the evolutionary path of η Car.; Contexte : η Car est une des étoiles brillantes bleues variables les plus intrigante de notre galaxie. Les observations et les modèles des émissions X, UV et optique et IR suggèrent qu'une étoile binaire avec une orbite fortement excentrique de période 5,54 ans réside au centre de son coeur. Les simulations hydrodynamiques et de transfert radiatif 2D et 3D prédisent la présence d'une étoile primaire avec vent stellaire dense et lent, qui interagit avec le vent de densité moindre et plus rapide de l'étoile secondaire. Ce scénario de collision vent-vent suggère que le vent de l'étoile secondaire pénètre dans le vent de l'étoile primaire, créant dans ce dernier une cavité de faible densité, avec des murs denses où les deux vents interagissent. Cependant, la morphologie de cette cavité et ses propriétés physiques ne sont pas encore pleinement contraints.Objectifs. Nous visons à déterminer la structure interne de l’interaction vent-vent de Car dans une zone allant de 5 à 50 Unités Astronomiques, telle que vue à travers Br γ et, pour la première fois, à travers la transition 2s-2p de He I.Méthodes : Nous avons utilisé des observations spectro-interférométriques du combineur de faisceaux en bande K de GRAVITY au VLTI. Les analyses des données comprennent: (i) un ajustement de modèle paramétrique aux observables interférométriques, (ii) un modèle CMFGEN du spectre de la source, et (iii) des reconstructions d'image interférométriques.Résultats : Notre modélisation géométrique des données du continuum nous permet d'estimer sa taille angulaire FWHM proche de 2 mas et son coefficient d'allongement de 1,06 ± 0,05 sur un PA = 130° ± 20°. Notre modélisation CMFGEN du spectre nous a permis de confirmer que le rôle de l'étoile secondaire devrait être pris en compte pour reproduire correctement les émissions Br γ et He I observées. Les images spectrales dans la bande Br γ révèle une caractéristique semblable à un arc au sud-est, peut-être associé aux vents chauds post-choc circulant le long du mur de la cavité. Les images dans la bande He I 2s-2p ont servi à contraindre la structure de la région d'émission de la transition, avec une résolution de 20 millisecondes d'arc (50 UA). La morphologie observée de He I suggère que l'étoile secondaire est responsable de l'ionisationproduisant le profil de raie. Les deux images (en Br γ et He I 2s-2p) sont compatibles avec les modèles hydrodynamiques précédents du scénario de vent en collision. De futures simulations dédiées ainsi qu’une vaste campagne interférométrique sont nécessaires pour affiner nos contraintes sur le vent et les paramètres stellaires de la binaire, ce qui nous aidera enfin à prédire le chemin évolutif de η Car.
Published: 2018

29. Multiple star systems in the Orion nebula

Author: Karl, Martina, Pfuhl, Oliver, Eisenhauer, Frank, Genzel, Reinhard, Grellmann, Rebekka, Habibi, Maryam, Abuter, Roberto, Accardo, Matteo, Amorim, Antonio, Anugu, Narsireddy, Avila, Gerardo, Benisty, Myriam, Berger, Jean-Philippe, Blind, Nicolas, Bonnet, Henri, Bourget, Pierre, Brandner, Wolfgang, Brast, Roland, Buron, Alexander, Garatti, Alessio Caratti O., Chapron, Frederic, Clenet, Yann, Collin, Claude, du Foresto, Vincent Coude, de Wit, Willem-Jan, de Zeeuw, Tim, Deen, Casey, Delplancke-Stroebele, Francoise, Dembet, Roderick, Derie, Frederic, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Esselborn, Michael, Fedou, Pierre, Finger, Gert, Garcia, Paulo, Dabo, Cesar Enrique Garcia, Lopez, Rebeca Garcia, Gao, Feng, Gendron, Eric, Gillessen, Stefan, Gonte, Frederic, Gordo, Paulo, Groezinger, Ulrich, Guajardo, Patricia, Guieu, Sylvain, Haguenauer, Pierre, Hans, Oliver, Haubois, Xavier, Haug, Marcus, Haussmann, Frank, Henning, Thomas, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Hubert, Zoltan, Hubin, Norbert, Jakob, Gerd, Jochum, Lieselotte, Jocou, Laurent, Kaufer, Andreas, Kellner, Stefan, Kendrew, Sarah, Kern, Lothar, Kervella, Pierre, Kiekebusch, Mario, Klein, Ralf, Koehler, Rainer, Kolb, Johan, Kulas, Martin, Lacour, Sylvestre, Lapeyrere, Vincent, Lazareff, Bernard, Le Bouquin, Jean-Baptiste, Lena, Pierre, Lenzen, Rainer, Leveque, Samuel, Lin, Chien-Cheng, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Merand, Antoine, Moulin, Thibaut, Mueller, Eric, Mueller, Friedrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Perrin, Guy, Pflueger, Andreas, Plewa, Philipp M., Popovic, Dan, Rabien, Sebastian, Ramirez, Andres, Ramos, Jose, Rau, Christian, Riquelme, Miguel, Rodriguez-Coira, Gustavo, Rohloff, Ralf-Rainer, Rosales, Alejandra, Rousset, Gerard, Sanchez-Bermudez, Joel, Scheithauer, Silvia, Schoeller, Markus, Schuhler, Nicolas, Spyromilio, Jason, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marcos, Tristram, Konrad R. W., Ventura, Noel, Vincent, Frederic, Waisberg, Idel, Wank, Imke, Widmann, Felix, Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, Zins, Gerard, Karl, Martina, Pfuhl, Oliver, Eisenhauer, Frank, Genzel, Reinhard, Grellmann, Rebekka, Habibi, Maryam, Abuter, Roberto, Accardo, Matteo, Amorim, Antonio, Anugu, Narsireddy, Avila, Gerardo, Benisty, Myriam, Berger, Jean-Philippe, Blind, Nicolas, Bonnet, Henri, Bourget, Pierre, Brandner, Wolfgang, Brast, Roland, Buron, Alexander, Garatti, Alessio Caratti O., Chapron, Frederic, Clenet, Yann, Collin, Claude, du Foresto, Vincent Coude, de Wit, Willem-Jan, de Zeeuw, Tim, Deen, Casey, Delplancke-Stroebele, Francoise, Dembet, Roderick, Derie, Frederic, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Esselborn, Michael, Fedou, Pierre, Finger, Gert, Garcia, Paulo, Dabo, Cesar Enrique Garcia, Lopez, Rebeca Garcia, Gao, Feng, Gendron, Eric, Gillessen, Stefan, Gonte, Frederic, Gordo, Paulo, Groezinger, Ulrich, Guajardo, Patricia, Guieu, Sylvain, Haguenauer, Pierre, Hans, Oliver, Haubois, Xavier, Haug, Marcus, Haussmann, Frank, Henning, Thomas, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Hubert, Zoltan, Hubin, Norbert, Jakob, Gerd, Jochum, Lieselotte, Jocou, Laurent, Kaufer, Andreas, Kellner, Stefan, Kendrew, Sarah, Kern, Lothar, Kervella, Pierre, Kiekebusch, Mario, Klein, Ralf, Koehler, Rainer, Kolb, Johan, Kulas, Martin, Lacour, Sylvestre, Lapeyrere, Vincent, Lazareff, Bernard, Le Bouquin, Jean-Baptiste, Lena, Pierre, Lenzen, Rainer, Leveque, Samuel, Lin, Chien-Cheng, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Merand, Antoine, Moulin, Thibaut, Mueller, Eric, Mueller, Friedrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Perrin, Guy, Pflueger, Andreas, Plewa, Philipp M., Popovic, Dan, Rabien, Sebastian, Ramirez, Andres, Ramos, Jose, Rau, Christian, Riquelme, Miguel, Rodriguez-Coira, Gustavo, Rohloff, Ralf-Rainer, Rosales, Alejandra, Rousset, Gerard, Sanchez-Bermudez, Joel, Scheithauer, Silvia, Schoeller, Markus, Schuhler, Nicolas, Spyromilio, Jason, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marcos, Tristram, Konrad R. W., Ventura, Noel, Vincent, Frederic, Waisberg, Idel, Wank, Imke, Widmann, Felix, Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, and Zins, Gerard
Abstract: This work presents an interferometric study of the massive-binary fraction in the Orion Trapezium cluster with the recently comissioned GRAVITY instrument. We observed a total of 16 stars of mainly OB spectral type. We find three previously unknown companions for theta(1) Ori B, theta(2) Ori B, and theta(2) Ori C. We determined a separation for the previously suspected companion of NU Ori. We confirm four companions for theta(1) Ori A, theta(1) Ori C, theta(1) Ori D, and theta(2) Ori A, all with substantially improved astrometry and photometric mass estimates. We refined the orbit of the eccentric high-mass binary theta(1) Ori C and we are able to derive a new orbit for theta(1) Ori D. We find a system mass of 21.7 M-circle dot and a period of 53 days. Together with other previously detected companions seen in spectroscopy or direct imaging, eleven of the 16 high-mass stars are multiple systems. We obtain a total number of 22 companions with separations up to 600 AU. The companion fraction of the early B and O stars in our sample is about two, significantly higher than in earlier studies of mostly OB associations. The separation distribution hints toward a bimodality. Such a bimodality has been previously found in A stars, but rarely in OB binaries, which up to this point have been assumed to be mostly compact with a tail of wider companions. We also do not find a substantial population of equal-mass binaries. The observed distribution of mass ratios declines steeply with mass, and like the direct star counts, indicates that our companions follow a standard power law initial mass function. Again, this is in contrast to earlier findings of flat mass ratio distributions in OB associations. We excluded collision as a dominant formation mechanism but find no clear preference for core accretion or competitive accretion.
Published: 2018

30. First Light for GRAVITY: A New Era for Optical Interferometry

Author: Abuter, Roberto, Accardo, Matteo, Antonio, Amorim, Narsireddy, Anugu, Avila, Gerardo, Benisty, Myriam, Berger, Jean-Philippe, Blind, Nicolas, Bonnet, Henri, Bourget, Pierre, Brandner, Wolfgang, Brast, Roland, Buron, Alexander, Cassaing, Frederic, Chapron, Frédéric, Choquet, Elodie, Clénet, Yann, Collin, Claude, Coudé du Forestol, Vincent, de Wit, Willem-Jan, De Zeeuw, Tim, Casey, Deen, Delplancke-Ströbele, Françoise, Dembet, Roderick, Derie, Frédéric, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Eisenhauer, Frank, Michael, Esselborn, Fédou, Pierre, Finger, Gert, Garcia, Paulo, Garcia Dabo, Cesar Enrique, Garcia Lopez, Rebeca, Gao, Feng, Gendron, Eric, Genzel, Reinhard, Gillessen, Stefan, Conté, Frédéric, Gordo, Paulo, Grould, Marion, Groözinger, Ulrich, Guieu, Sylvain, Haguenauer, Pierre, Hans, Olivier, Haubois, Xavier, Haug, Marcus, Haussmann, Frank, Henning, Thomas, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Hubert, Zoltan, Hubin, Norbert, Hummel, Christian, Jakob, Gerd, Jochum, Lieselotte, Jocou, Laurent, Karl, Martina, Kaufer, Andreas, Kellner, Stefan, Kendrew, Sarah, Kern, Lothar, Kervella, Pierre, Kiekebusch, Mario, Klein, Ralf, Kolb, Johan, Kulas, Martin, Lacour, Sylvestre, Lapeyrère, Vincent, Lazareff, Bernard, Le Bouquin, Jean-Baptiste, Léna, Pierre, Lenzen, Rainer, Levêque, Samuel, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Mellein, Marcus, Merand, Antoine, Moreno-Ventas, Javier, Moulin, Thibaut, Müller, Eric, Müller, Friedrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Perrin, Guy, Petrucci, Pierre-Olivier, Pflüger, Andreas, Pfuhl, Olivier, Duc, Thanh Phan, Plewa, Philipp, Popovic, Dan, Rabien, Sebastian, Ramirez, Andres, Ramos, Jose, Rau, Christian, Riquelme, Miguel, Rodriguez-Coira, Gustavo, Rohloff, Ralf-Rainer, Rosales, Alejandra, Rousset, Gérard, Sanchez-Bermudez, Joel, Scheithauer, Sylvia, Schöller, Marcus, Schuhler, Nicolas, Spyromilio, Jason, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marco, Tristram, Konrad, Ventura, Noel, Vincent, Frédéric, Waisberg, Idel, Wank, Imke, Widmann, Felix, Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, Zins, Gérard, European Southern Observatory (ESO), CENTRA, Universidade de Lisboa, Universidade do Porto = University of Porto, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève = University of Geneva (UNIGE), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Max Planck Institute for Extraterrestrial Physics (MPE), ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Leiden Observatory [Leiden], Universiteit Leiden, Physikalisches Institut [Köln], Universität zu Köln = University of Cologne, Max Planck Institute for Radio Astronomy, Department of Physics [Berkeley], University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Agence Spatiale Européenne = European Space Agency (ESA), Universidad de Santiago de Chile [Santiago] (USACH), European Southern Observatory [Santiago] (ESO), CENTRA, Universidade do Porto, Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Université de Genève (UNIGE), ONERA, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Universiteit Leiden [Leiden], Universität zu Köln, University of California [Berkeley], University of California-University of California, European Space Agency (ESA), and Universidade do Porto
Subjects: COPHASAGE, 010308 nuclear & particles physics, INTERFEROMETRIE GRANDE BASE, LONG-BASELINE INTERFEROMETRY, IMAGERIE INTERFEROMETRIQUE, 01 natural sciences, INTERFEROMETRIC IMAGING, VLTI, PHASE TRACKING, ASTROMETRY, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ASTROMETRIE, 010303 astronomy & astrophysics, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: With the arrival of the second generation instrument GRAVITY, the Very Large Telescope Interferometer (VLTI) has entered a new era of optical interferometry. This instrument pushes the limits of accuracy and sensitivity by orders of magnitude. GRAVITY has achieved phase-referenced imaging at approximately milliarcsecond (mas) resolution and down to ~ 100-microarcsecond astrometry on objects that are several hundred times fainter than previously observable. The cutting-edge design presented in Eisenhauer et al. (2011) has become reality. This article sketches out the basic principles of the instrument design and illustrates its performance with key science results obtained during commissioning: phase-tracking on stars with K ~ 10 mag, phase-referenced interferometry of objects fainter than K ≳ 17 mag, minute-long coherent integrations, a visibility accuracy of better than 0.25 %, and spectro-differential phase and closure phase accuracy better than 0.5 degrees, corresponding to a differential astrometric precision of a few microarcseconds (μas)., Published in The Messenger vol. 170, pp. 10-15, December 2017.
Published: 2017

31. First light for GRAVITY: Phase referencing optical interferometry for the Very Large Telescope Interferometer

Author: Abuter, Roberto, Accardo, Matteo, Antonio, Amorim, Narsireddy, Anugu, Avila, Gerardo, Azouaoui, N., Benisty, Myriam, Berger, Jean-Philippe, Blind, Nicolas, Bonnet, Henri, Bourget, Pierre, Brandner, Wolfgang, Brast, Roland, Buron, Alexander, Burtscher, L., Cassaing, Frederic, Chapron, Frédéric, Choquet, Elodie, Clénet, Yann, Collin, Claude, Coudé du Forestol, Vincent, de Wit, Willem-Jan, De Zeeuw, Tim, Casey, Deen, Delplancke-Ströbele, Françoise, Dembet, Roderick, Derie, Frédéric, Dexter, Jason, Duvert, Gilles, Ebert, Monica, Eckart, Andreas, Eisenhauer, Frank, Michael, Esselborn, Fédou, Pierre, Finger, Gert, Garcia, Paulo, Garcia Dabo, Cesar Enrique, Garcia Lopez, Rebeca, Gendron, Eric, Genzel, Reinhard, Gillessen, Stefan, Conté, Frédéric, Gordo, Paulo, Grould, Marion, Groözinger, Ulrich, Guieu, Sylvain, Haguenauer, Pierre, Hans, Olivier, Haubois, Xavier, Haug, Marcus, Haussmann, Frank, Henning, Thomas, Hippler, Stefan, Horrobin, Matthew, Huber, Armin, Hubert, Zoltan, Hubin, Norbert, Hummel, Christian, Jakob, Gerd, Janssen, A., Jochum, Lieselotte, Jocou, Laurent, Kaufer, Andreas, Kellner, Stefan, Kendrew, Sarah, Kern, Lothar, Kervella, Pierre, Kiekebusch, Mario, Klein, Ralf, Kok, Y., Kolb, Johan, Kulas, Martin, Lacour, Sylvestre, Lapeyrère, Vincent, Lazareff, Bernard, Le Bouquin, Jean-Baptiste, Léna, Pierre, Lenzen, Rainer, Levêque, Samuel, Lippa, Magdalena, Magnard, Yves, Mehrgan, Leander, Mellein, Marcus, Merand, Antoine, Moreno-Ventas, Javier, Moulin, Thibaut, Müller, Eric, Müller, Fredrich, Neumann, Udo, Oberti, Sylvain, Ott, Thomas, Pallanca, Laurent, Panduro, Johana, Pasquini, Luca, Paumard, Thibaut, Percheron, Isabelle, Perraut, Karine, Perrin, Guy, Pflüger, Andreas, Pfuhl, Olivier, Duc, Thanh Phan, Plewa, Philipp, Popovic, Dan, Rabien, Sebastian, Ramirez, Andres, Ramos, Jose, Rau, Christian, Riquelme, Miguel, Rohloff, Ralf-Rainer, Rousset, Gérard, Sanchez-Bermudez, Joel, Scheithauer, Sylvia, Schöller, Marcus, Schuhler, Nicolas, Spyromilio, Jason, Straubmeier, Christian, Sturm, Eckhard, Suarez, Marco, Tristram, Konrad, Ventura, Noel, Vincent, Frédéric, Waisberg, Idel, Wank, Imke, Weber, J., Wieprecht, Ekkehard, Wiest, Michael, Wiezorrek, Erich, Wittkowski, Markus, Woillez, Julien, Wolff, Burkhard, Yazici, Senol, Ziegler, Denis, Zins, Gérard, European Southern Observatory (ESO), CENTRA, Universidade de Lisboa, Universidade do Porto, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève (UNIGE), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Max Planck Institute for Extraterrestrial Physics (MPE), Leiden Observatory [Leiden], Universiteit Leiden [Leiden], ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Physikalisches Institut [Köln], Universität zu Köln, Max Planck Institute for Radio Astronomy, Department of Physics [Berkeley], University of California [Berkeley], University of California-University of California, European Space Agency (ESA), European Southern Observatory [Santiago] (ESO), and GRAVITY Collaboration
Subjects: ADAPTIVE OPTICS, CENTER, Galaxy: center, INTERFEROMETRIE GRANDE BASE, stars: pre-main sequence, ÉTOILE DOUBLE, QUASAR, instrumentation: adaptive optics, OPTIQUE ADAPTATIVE, [PHYS.PHYS.PHYS-SPACE-PH]Physics [physics]/Physics [physics]/Space Physics [physics.space-ph], GALAXY, quasars: emission lines, EMISSION LINE, INSTRUMENTATION OPTIQUE, INSTRUMENTATION, binaries: symbiotic, INTERFEROMETERS, instrumentation: interferometers, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], CENTRE GALACTIQUE, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience; GRAVITY is a new instrument to coherently combine the light of the European Southern Observatory Very Large Telescope Interferometer to form a telescope with an equivalent 130 m diameter angular resolution and a collecting area of 200 m2. The instrument comprises fiber fed integrated optics beam combination, high resolution spectroscopy, built-in beam analysis and control, near-infrared wavefront sensing, phase-tracking, dual-beam operation, and laser metrology. GRAVITY opens up to optical/infrared interferometry the techniques of phase referenced imaging and narrow angle astrometry, in many aspects following the concepts of radio interferometry. This article gives an overview of GRAVITY and reports on the performance and the first astronomical observations during commissioning in 2015/16. We demonstrate phase-tracking on stars as faint as mK ≈ 10 mag, phase-referenced interferometry of objects fainter than mK ≈ 15 mag with a limiting magnitude of mK ≈ 17 mag, minute long coherent integrations, a visibility accuracy of better than 0.25%, and spectro-differential phase and closure phase accuracy better than 0.5°, corresponding to a differential astrometric precision of better than ten microarcseconds (μas). The dual-beam astrometry, measuring the phase difference of two objects with laser metrology, is still under commissioning. First observations show residuals as low as 50 μas when following objects over several months. We illustrate the instrument performance with the observations of archetypical objects for the different instrument modes. Examples include the Galactic center supermassive black hole and its fast orbiting star S2 for phase referenced dual-beam observations and infrared wavefront sensing, the high mass X-ray binary BP Cru and the active galactic nucleus of PDS 456 for a few μas spectro-differential astrometry, the T Tauri star S CrA for a spectro-differential visibility analysis, ξ Tel and 24 Cap for high accuracy visibility observations, and η Car for interferometric imaging with GRAVITY.; GRAVITY est un nouvel instrument permettant la recombinaison interférométrique des télescopes du VLT (Very Large Telescope) de l'ESO (European Southern Observatory) pour former un télescope avec une limite de résolution équivalente à un diamètre 130 m et une surface collectrice de 200 m². L'instrument inclut un dispositif en optique intégré alimenté par fibre pour recombinaison des faisceaux, un spectromètre à haute résolution, des dispositifs intégrés d'analyse et de contrôle, un analyse de surface d'onde en infrarouge (IR) proche, un suiveur de frange, un mode double champ et une métrologie laser. GRAVITY fait office de précurseur en introduisant en interférométrie optique/IR les techniques de référence de phase et d'astrométrie à faible champ, inspirées des concepts développés en radio-interférométrie. Cet article donne un aperçu de GRAVITY et rend compte des performances et des premières observations astronomiques lors de la mise en service en 2015/16. Nous démontrons le suivi de phase sur des étoiles aussi faible que mK ≈ 10 mag, l'interférométrie par référence de phase sur des objets plus faibles que mK ≈ 15 mag avec une magnitude limite de mK ≈ 17 mag, des intégrations cohérentes pendant une minute, une précision de mesure de visibilité meilleure que 0,25%, et une précision sur la mesure des phases différentielles spectrales ou des clôtures de phase meilleure que 0,5 °, correspondant à une précision astrométrique différentielle meilleure que dix microsecondes d'arc (μas). L'astrométrie à double champ, mesurant la différence de phase entre deux objets avec métrologie laser, est encore en cours de test. Les premières observations montrent des résidus aussi bas que 50 μas en suivant des objets sur plusieurs mois. Nous illustrons la performance de l'instrument avec les observations d'objets archétypiques pour les différents modes d'instrument. Les exemples comprennent le trou noir supermassif du centre galactique et son étoile S2 en orbite rapide pour les observations à double champ avec référence de phase et analyse de front d'onde IR, l'étoile binaire massive BP Cru à émission X et le noyau galactique actif de PDS 456 pour quelques cas de spectro-astrométrie différentielle avec quelques μas de précision, l'étoile S CrA (de type T Tauri) pour une analyse spectro-différentielle de visibilité, les étoiles ξ Tel et 24 Cap pour des observations de visibilité de haute précision, et η Car pour une imagerie interférométrique avec GRAVITY.
Published: 2017

32. NanoCarb spaceborne miniaturized GHG sensor: first experimental results

Author: Cugny, Bruno, Sodnik, Zoran, Karafolas, Nikos, Gousset, Silvère, Rodrigo, Juana M., Le Coarer, Etienne, Ehrhardt, Hélène, Stadler, Eric, Hubert, Zoltán, Magnard, Yves, Croizé, Laurence, Ferrec, Yann, de la Barrière, Florence, Domel, Roland, Coudrain, Christophe, Gouyon, Remi, Chambon, Mathieu, Perrault, Philippe, Boussey, Jumana, Gourgon, Cécile, Panabière, Marie, and Gerges, Nadine
Published: 2021
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33. SHADOWS: a spectro-gonio radiometer for bidirectional reflectance studies of dark meteorites and terrestrial analogs: design, calibrations, and performances on challenging surfaces

Author: Potin, Sandra, primary, Brissaud, Olivier, additional, Beck, Pierre, additional, Schmitt, Bernard, additional, Magnard, Yves, additional, Correia, Jean-Jacques, additional, Rabou, Patrick, additional, and Jocou, Laurent, additional
Published: 2018
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34. MAORY for ELT: preliminary design overview

Author: Diolaiti, Emiliano, primary, Ciliegi, Paolo, primary, Abicca, Renata, primary, Agapito, Guido, primary, Arcidiacono, Carmelo, primary, Baruffolo, Andrea, primary, Bellazzini, Michele, primary, Bonaglia, Marco, primary, Bregoli, Giovanni, primary, Brissaud, Olivier, primary, Busoni, Lorenzo, primary, Feautrier, Philippe, primary, Maiorano, Elisabetta, primary, Michaud, Laurence, primary, Auricchio, Natalia, primary, Balestra, Andrea, primary, Di Antonio, Ivan, primary, Grani, Paolo, primary, Greggio, Davide, primary, Rochat, Sylvain, primary, Carlotti, Alexis, primary, Cascone, Enrico, primary, Correia, Jean-Jacques, primary, Cortecchia, Fausto, primary, Cosentino, Giuseppe, primary, D'Orazi, Valentina, primary, Dall'Ora, Massimo, primary, De Caprio, Vincenzo, primary, De Rosa, Adriano, primary, Delboulbe, Alain, primary, Di Rico, Gianluca, primary, Esposito, Simone, primary, Fantinel, Daniela, primary, Fiorentino, Giuliana, primary, Foppiani, Italo, primary, Giro, Enrico, primary, Gluck, Laurence, primary, Hénault, Francois B., primary, Jocou, Laurent, primary, La Penna, Paolo, primary, Lafrasse, Sylvain, primary, Lauria, Mimma, primary, Le Coarer, Etienne P., primary, Le Louarn, Miska, primary, Lombini, Matteo, primary, Magnard, Yves, primary, Mannucci, Filippo, primary, Marchetti, Enrico, primary, Maurel, Didier, primary, Morgante, Gianluca, primary, Moulin, Thibaut, primary, Oberti, Sylvain, primary, Patti, Mauro, primary, Plantet, Cédric, primary, Podio, Linda, primary, Puglisi, Alfio T., primary, Rabou, Patrick, primary, Ragazzoni, Roberto, primary, Riva, Marco, primary, Aliverti, Matteo, primary, Roussel, Frédéric, primary, Roux, Alain, primary, Salasnich, Bernardo, primary, Saracco, Paolo, primary, Schreiber, Laura, primary, Spavone, Marilena, primary, Stadler, Eric, primary, Sztefek, Marie-Hélène, primary, Ventura, Noël, primary, Vérinaud, Christophe, primary, Zaggia, Simone, primary, Dolci, Mauro, primary, Magrin, Demetrio, primary, Moraux, Estelle, primary, Pariani, Giorgio, primary, Redaelli, Edoardo, primary, Terenzi, Luca, primary, and Valentini, Angelo, primary
Published: 2018
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35. Characterization of ALPAO deformable mirrors for the NAOMI VLTI Auxiliary Telescopes adaptive optics

Author: Le Bouquin, Jean-Baptiste, primary, Berger, Jean-Philippe, primary, Rochat, Sylvain, primary, Jocou, Laurent, primary, Moulin, Thibaut, primary, Magnard, Yves, primary, Verinaud, Christophe, primary, Delboulbe, Alain, primary, Cottalorda, Eric, primary, Beuzit, Jean-Luc, primary, Egner, Sébastien E., primary, Haguenauer, Pierre, primary, Woillez, Julien, primary, Gonte, Frederic Yves Joseph, primary, and Guieu, Sylvain, primary
Published: 2018
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36. System analysis and expected performance of a high-contrast module for HARMONI

Author: Carlotti, Alexis, primary, Hénault, François B., primary, Dohlen, Kjetil, primary, Mouillet, David, primary, Sauvage, Jean-François, primary, Fusco, Thierry, primary, El Hadi, Kacem, primary, Clarke, Fraser, primary, Tecza, Matthias, primary, Schnetler, Hermine, primary, Bryson, Ian, primary, Chauvin, Gael, primary, Vola, Pascal, primary, Magnard, Yves, primary, Vigan, Arthur, primary, Thatte, Niranjan A., primary, Rabou, Patrick, primary, Bonnefoy, Mickaël, primary, and Vérinaud, Christophe, primary
Published: 2018
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37. The MAORY laser guide star wavefront sensor: design status

Author: Feautrier, Philippe, primary, Stadler, Eric, primary, Rabou, Patrick, primary, Correia, Jean-Jacques, primary, Rochat, Sylvain, primary, Jocou, Laurent, primary, Gluck, Laurence, primary, Diolaiti, Emiliano, primary, Arcidiacono, Carmelo, primary, Cortecchia, Fausto, primary, Ciliegi, Paolo, primary, Oberti, Sylvain, primary, Schreiber, Laura, primary, Magnard, Yves, primary, Moulin, Thibaut, primary, Delboulbé, Alain, primary, Douté, Sylvain, primary, Chauvin, Gaël, primary, Moraux, Estelle, primary, Verinauld, Christophe, primary, Bellazzini, Michele, primary, Ragazzoni, Roberto, primary, Esposito, Simone, primary, and Busoni, Lorenzo, primary
Published: 2018
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38. VLTI status update: three years into the second generation

Author: Abad, José Antonio, primary, Abuter, Roberto, primary, Aller-Carpentier, Emmanuel, primary, Alonso, Jaime, primary, Andolfato, Luigi, primary, Barriga, Pablo José, primary, Beltran, Juan, primary, Berger, Jean-Philippe, primary, Fuentaseca, Eloy, primary, Woillez, Julien, primary, Gonté, Frédéric, primary, Egner, Sébastien, primary, Mérand, Antoine, primary, Haubois, Xavier, primary, Schuhler, Nicolas, primary, Darré, Pascaline, primary, Bourget, Pierre, primary, Brast, Roland, primary, Bristow, Paul, primary, Caniguante, Luis, primary, Conzelmann, Ralf, primary, Cortes, Angela, primary, Delboulbé, Alain, primary, Delplancke-Ströbele, Françoise, primary, Del Valle, Diego, primary, Dembet, Roderick, primary, Derie, Frédéric, primary, Donoso, Reinaldo, primary, Duhoux, Philippe, primary, Dupuy, Christophe, primary, Föster, Andreas, primary, Frahm, Robert, primary, Gaytan, Daniel, primary, Glindemann, Andreas, primary, Gonzales, Jaime, primary, Guerlet, Thibaut, primary, Guieu, Sylvain, primary, Guisard, Stéphane, primary, Gutierrez, Pablo, primary, Haguenauer, Pierre, primary, Haimerl, Andreas, primary, van der Heyden, Pierre, primary, Huber, Stefan, primary, Hubin, Norbert, primary, Jochum, Lieselotte, primary, Jocou, Laurent, primary, Jolley, Paul, primary, Kirchbauer, Jean-Paul, primary, Kolb, Johann, primary, Kosmalski, Johan, primary, Krempl, Peter, primary, Le Bouquin, Jean-Baptiste, primary, Lévêque, Samuel, primary, Lilley, Paul, primary, Lizon, Jean-Louis, primary, Magnard, Yves, primary, Mardones, Pedro, primary, Meister, Alexandre, primary, Moulin, Thibaut, primary, Osorio, Juan, primary, Ott, Jürgen, primary, Pallanca, Laurent, primary, Paufique, Jérôme, primary, Pavez, Marcus, primary, Pasquini, Luca, primary, Percheron, Isabelle, primary, Pettazzi, Lorenzo, primary, Duc, Thanh Phan, primary, Pirard, Jean-François, primary, Pino, Andres, primary, Poupar, Sébastien, primary, Quentin, Juta, primary, Ramírez, Andrés, primary, Reyes, Javier, primary, Ridings, Robert, primary, Rochat, Sylvain, primary, Rivinius, Thomas, primary, Salgado, Fernando, primary, Schöller, Markus, primary, Shchekaturov, Pavel, primary, Stephan, Christian, primary, Suarez, Marcos, primary, Tamblay, Richard, primary, Tapia, mario, primary, Tristram, Konrad, primary, Valdes, Guillermo, primary, Verinaud, Christophe, primary, de Wit, Willem-Jan, primary, and Zins, Gérard, primary
Published: 2018
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39. NAOMI: the adaptive optics for the auxiliary telescopes of VLTI

Author: Woillez, Julien, primary, Egner, Sébastien, primary, Gonté, Frédéric, primary, Haguenauer, Pierre, primary, Aller-carpentier, Emmanuel, primary, Alonso, jaime, primary, Andolfato, Luigo, primary, Bourget, Pierre, primary, Darré, Pascaline, primary, Dembet, Roderick, primary, Dupuy, Christophe, primary, Gutierrez, pablo, primary, Huber, Stefan, primary, Hubin, Norbert, primary, Kirchbauer, Jean-paul, primary, Kolb, Johann, primary, Kosmalski, Johan, primary, Meister, Alexander, primary, Pasquini, Luca, primary, Reyes, Javier, primary, Shchekaturov, Pavel, primary, Schuhler, Nicolas, primary, Stephan, Christian, primary, Valdes, Guillermo, primary, Verinaud, Christophe, primary, Berger, Jean-Philippe, primary, Le Bouquin, Jean-baptiste, primary, Guieu, Sylvain, primary, Delboulbe, Alain, primary, Jocou, Laurent, primary, Magnard, Yves, primary, Moulin, Thibaut, primary, Rochat, Sylvain, primary, Stadler, Eric, primary, and Krempl, Peter, primary
Published: 2018
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40. Experimental test of a 40 cm-long R=100 000 spectrometer for exoplanet characterisation

Author: Bourdarot, Guillaume, primary, Le Coarer, Etienne, primary, Mouillet, David, primary, Jocou, Laurent, primary, Rabou, Patrick, primary, Correia, Jean-Jacques, primary, Bonfils, Xavier, primary, Stadler, Eric, primary, Carlotti, Alexis, primary, Forveille, Thierry, primary, Vigan, Arthur, primary, Artigau, Etienne, primary, Doyon, René, primary, Vallée, Philippe, primary, and Magnard, Yves, primary
Published: 2018
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41. Testing light concentrators prototypes for the Cherenkov Telescope Array

Author: Arezki, Brahim, primary, Magnard, Yves, primary, Khélifi, Bruno, primary, Olive, Jean-François, primary, Jean, Pierre, primary, Punch, Michael, primary, Hénault, François B., primary, Petrucci, Pierre-Olivier, primary, Jocou, Laurent, primary, and Manigot, Pascal, primary
Published: 2017
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42. The MAORY first-light adaptive optics module for E-ELT

Author: DIOLAITI, EMILIANO, AGAPITO, GUIDO, Antichi, Jacopo, ARCIDIACONO, CARMELO, BARUFFOLO, Andrea, BELLAZZINI, Michele, BREGOLI, Giovanni, BUTLER, REGINALD CHRISTOPHER, CASCONE, Enrico, CILIEGI, Paolo, CORTECCHIA, Fausto, Cosentino, Giuseppe, DE CAPRIO, VINCENZO, DE ROSA, ADRIANO GIUSEPPE, ESPOSITO, Simone, FANTINEL, Daniela, Feautrier, Philippe, FOPPIANI, ITALO, Giordano, Christophe, GIRO, Enrico, LOMBINI, MATTEO, MORGANTE, GIANLUCA, RAGAZZONI, Roberto, RICCARDI, Armando, RICCIARDI, SARA, SALASNICH, Bernardo, SCHREIBER, LAURA, Spano, Paolo, ZERBI, Filippo Maria, Casali, Mark, Kerber, Florian, Marchetti, Enrico, Ramsay, Suzanne, ABICCA, Renata, BONAGLIA, MARCO, BRIGUGLIO PELLEGRINO, RUNA ANTONIO, Brissaud, Olivier, BUSONI, LORENZO, CARBONARO, LUCA, Carlotti, Alexis, Correia, Jean-Jacques, DE PASCALE, Marco, DEL VECCHIO, Ciro, Delboulbé, Alain, DI RICO, Gianluca, Felini, Corrado, FERRUZZI, Debora, FINI, Luca, FIORENTINO, Giuliana, GHIGO, Mauro, Gluck, Laurence, Hénault, François, Jocou, Laurent, Lafrasse, Sylvain, LAURIA, MIMMA, le Coarer, Etienne, Magnard, Yves, MAIORANO, Elisabetta, MANNUCCI, FILIPPO, MAPELLI, MICHELA, Maurel, Didier, Michaud, Laurence, Moulin, Thibaut, Oberti, Sylvain, PARESCHI, Giovanni, Patti, Mauro, PUGLISI, Alfio Timothy, Rabou, Patrick, RIVA, Marco, Rochat, Sylvain, Roussel, Frédéric, Roux, Alain, SARACCO, Paolo, SPAVONE, MARILENA, Stadler, Eric, Sztefek, Marie-Hélène, Ventura, Noël, Vérinaud, Christophe, XOMPERO, MARCO, Zins, Gérard, ITA, FRA, and DEU
Subjects: Extremely Large Telescopes, MAORY, E-ELT, Multi-conjugate adaptive optics, multi-conjugate adaptive optics
Abstract: The MAORY adaptive optics module is part of the first light instrumentation suite for the E-ELT. The MAORY project phase B is going to start soon. This paper contains a system-level overview of the current instrument design.
Published: 2015

43. System analysis and expected performance of a high-contrast module for HARMONI.

Author: Carlotti, Alexis, Hénault, François, Dohlen, Kjetil, Sauvage, Jean-Franois, Rabou, Patrick, Magnard, Yves, Vigan, Arthur, Mouillet, David, Chauvin, Gael, Vola, Pascal, Bonnefoy, Mickael, Fusco, Thierry, El Hadi, Kacem, Thatte, Niranjan, Clarke, Fraser, Tecza, Matthias, Bryson, Ian, Schnetler, Hermine, and Vérinaud, Christophe
Published: 2018
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44. NAOMI: a low-order adaptive optics system for the VLT interferometer

Author: Gonté, Frédéric Yves J., additional, Alonso, Jaime, additional, Aller-Carpentier, Emmanuel, additional, Andolfato, Luigi, additional, Berger, Jean-Philippe, additional, Cortes, Angela, additional, Delplancke-Strobele, Françoise, additional, Donaldson, Rob, additional, Dorn, Reinhold J., additional, Dupuy, Christophe, additional, Egner, Sebastian E., additional, Huber, Stefan, additional, Hubin, Norbert, additional, Kirchbauer, Jean-Paul, additional, Le Louarn, Miska, additional, Lilley, Paul, additional, Jolley, Paul, additional, Martis, Alessandro, additional, Paufique, Jérôme, additional, Pasquini, Luca, additional, Quentin, Jutta, additional, Ridings, Robert, additional, Reyes, Javier, additional, Shchkaturov, Pavel, additional, Suarez, Marcos, additional, Phan Duc, Thanh, additional, Valdes, Guillermo, additional, Woillez, Julien, additional, Le Bouquin, Jean-Baptiste, additional, Beuzit, Jean-Luc, additional, Rochat, Sylvain, additional, Vérinaud, Christophe, additional, Moulin, Thibaut, additional, Delboulbé, Alain, additional, Michaud, Laurence, additional, Correia, Jean-Jacques, additional, Roux, Alain, additional, Maurel, Didier, additional, Stadler, Eric, additional, and Magnard, Yves, additional
Published: 2016
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45. Testing light concentrators prototypes for the Cherenkov Telescope Array.

Author: Hénault, François, Petrucci, Pierre-Olivier, Jocou, Laurent, Arezki, Brahim, Magnard, Yves, Khélifi, Bruno, Manigot, Pascal, Olive, Jean-François, Jean, Pierre, and Punch, Michael
Published: 2017
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46. Sphere: complete laboratory performance and prediction for on-sky first light

Author: Sauvage, Jean-François, Beuzit, Jean-Luc, Roelfsema, Ronald, Feldt, Markus, Dohlen, Kjetil, Mouillet, David, Puget, Pascal, Wildi, François, Abe, Lyu, Baruffolo, Andrea, Baudoz, Pierre, Bazzon, Andreas, Boccaletti, Anthony, Buey, Tristan, Carbillet, Marcel, Charton, Julien, Claudi, Riccardo, Costille, Anne, Delboulbe, Alain, Desidera, Silvano, Dominik, Carsten, Downing, Mark, Fabron, Christophe, Feautrier, Philippe, Fedrigo, Enrico, Fusco, Thierry, Giro, Enrico, Gluck, Laurence, Gratton, Raffaele, Henning, Thomas, Hubin, Norbert, Kasper, Markus, Lagrange, Anne-Marie, Langlois, Maud, Le Mignant, David, Lizon, Jean-Louis, Madec, Fabrice, Magnard, Yves, Martinez, Patrice, Mesa, Dino, Möller-Nilsson, Ole, Moulin, Thibaut, Moutou, Claire, Pavlov, Alexey, Perret, Denis, Petit, Cyril, Pragt, Johan, Rabou, Patrick, Rochat, Sylvain, Salasnich, Bernardo, Rousset, Gérard, Schmid, Hans-Martin, Sevin, Arnaud, Soenke, Christian, Stadler, Eric, Suarez, Marcos, Turatto, Massimo, Udry, Stephane, Vigan, Arthur, Vakili, Farrokh, Zins, Gerard, Zurlo, Alice, Bazzon, Andrea, Lagrange, Anne, Shaklan, Stuart, ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), NOVA-ASTRON, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève = University of Geneva (UNIGE), Laboratoire Hippolyte Fizeau (FIZEAU), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Collège de France (CdF (institution)), European Southern Observatory (ESO), Institut Pythéas (OSU PYTHEAS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), DOTA, ONERA, Université Paris Saclay (COmUE) [Châtillon], Université Lille 3 - UFR Information, Documentation, Information Scientifique et Technique (Lille 3 UFR IDIST), Université de Lille, Sciences Humaines et Sociales, Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Université Joseph Fourier - Grenoble 1 (UJF), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), ONERA - The French Aerospace Lab [Toulouse], ONERA, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Joseph Louis LAGRANGE (LAGRANGE), European Southern Observatory [Santiago] (ESO), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Genève (UNIGE), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Collège de France (CDF), Collège de France (CdF), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD), DOTA, ONERA, Université Paris Saclay [Châtillon], ONERA-Université Paris-Saclay, université J.Fourier, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Shaklan, S.
Subjects: media_common.quotation_subject, Astronomy, Polarimetry, Flux, 02 engineering and technology, Astrophysics, Star (graph theory), 01 natural sciences, 7. Clean energy, 010309 optics, 0103 physical sciences, Astrophysics::Galaxy Astrophysics, media_common, Physics, Very Large Telescope, Research Programm of Institute for Mathematics, Astrophysics and Particle Physics, Astrophysics::Instrumentation and Methods for Astrophysics, First light, 021001 nanoscience & nanotechnology, Exoplanet, Planetary science, Sky, Proceedings of SPIE, Astrophysics::Earth and Planetary Astrophysics, 0210 nano-technology, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: International audience; Direct imaging of exoplanet is one of the most exciting field of planetology today. The light coming from exoplanet orbiting their host star witnesses for the chemical composition of the atmosphere, and the potential biomarkers for life. However, the faint flux to be imaged, very close to the huge flux of the parent star, makes this kind of observation extremely difficult to perform from the ground. The direct imaging instruments (SPHERE [1], GPI [2]) are nowaday reaching lab maturity. Such instrument imply the coordination of XAO for atmospherical turbulence real-time correction, coronagraphy for star light extinction, IR Dual band camera, IFS, and visible polarimetry. The imaging modes include single and double difference (spectral and angular). The SPHERE project is now at the end of AIT phase. This paper presents the very last results obtained in laboratory, with realistic working conditions. These AIT results allows one to predict on-sky performance, that should come within the next weeks after re-installation at Very Large Telescope at Paranal.
Published: 2013

47. The MAORY laser guide star wavefront sensor: design status

Author: Close, Laird M., Schreiber, Laura, Schmidt, Dirk, Schreiber, Laura, Feautrier, Philippe, Stadler, Eric, Rabou, Patrick, Correia, Jean-Jacques, Glück, Laurence, Rochat, Sylvain, Jocou, Laurent, Magnard, Yves, Moulin, Thibaut, Delboulbé, Alain, Douté, Sylvain, Chauvin, Gaël, Moraux, Estelle, Oberti, Sylvain, Verinaud, Christophe, Cortecchia, Fausto, Arcidiacono, Carmelo, Diolaiti, Emiliano, Ciliegi, Paolo, Bellazzini, Michele, Esposito, Simone, Busoni, Lorenzo, and Ragazzoni, Roberto
Published: 2018
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48. Experimental test of a 40 cm-long R=100 000 spectrometer for exoplanet characterisation

Author: Evans, Christopher J., Simard, Luc, Takami, Hideki, Bourdarot, Guillaume, Le Coarer, Etienne, Mouillet, David, Correia, Jean-Jacques, Jocou, Laurent, Rabou, Patrick, Carlotti, Alexis, Bonfils, Xavier, Artigau, Etienne, Vallee, Philippe, Doyon, Rene, Forveille, Thierry, Stadler, Eric, Magnard, Yves, and Vigan, Arthur
Published: 2018
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49. System analysis and expected performance of a high-contrast module for HARMONI

Author: Evans, Christopher J., Simard, Luc, Takami, Hideki, Carlotti, Alexis, Hénault, François, Dohlen, Kjetil, Sauvage, Jean-François, Rabou, Patrick, Magnard, Yves, Vigan, Arthur, Mouillet, David, Chauvin, Gael, Vola, Pascal, Bonnefoy, Mickael, Fusco, Thierry, El Hadi, Kacem, Thatte, Niranjan, Clarke, Fraser, Tecza, Matthias, Bryson, Ian, Schnetler, Hermine, and Vérinaud, Christophe
Published: 2018
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50. NAOMI: the adaptive optics for the auxiliary telescopes of VLTI

Author: Creech-Eakman, Michelle J., Tuthill, Peter G., Mérand, Antoine, Gonté, Frédéric, Egner, Sebastien, Haguenauer, Pierre, Woillez, Julien, Aller-Carpentier, Emmanuel, Alonso, Jaime, Andolfato, Luigi, Bourget, Pierre, Darré, Pascaline, Dembet, Roderick, Dupuy, Christophe, Gutierrez, Pablo, Huber, Stefan, Hubin, Norbert, Kirchbauer, Jean-Paul, Kolb, Johann, Kosmalski, Johan, Meister, Alexander, Pasquini, Luca, Reyes, Javier, Shchekaturov, Pavel, Schuhler, Nicolas, Stephan, Christian, Valdes, Guillermo, Vérinaud, Christophe, Berger, Jean-Philippe, Le Bouquin, Jean-Baptiste, Guieu, Sylvain, Delboulbé, Alain, Jocou, Laurent, Magnard, Yves, Moulin, Thibaut, Rochat, Sylvain, Stadler, Eric, and Krempl, Peter
Published: 2018
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