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1. HARMONI at ELT: overview of the capabilities and expected performance of the ELT's first light, adaptive optics assisted integral field spectrograph

Author

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

Subjects
ELT, [PHYS]Physics [physics], [SPI]Engineering Sciences [physics], [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], OPTIQUE ADAPTATIVE, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; HARMONI is the first light, adaptive optics assisted, integral field spectrograph for the European Southern Observatory’s Extremely Large Telescope (ELT). A work-horse instrument, it provides the ELT’s diffraction limited spectroscopic capability across the near-infrared wavelength range. HARMONI will exploit the ELT’s unique combination of exquisite spatial resolution and enormous collecting area, enabling transformational science. The design of the instrument is being finalized, and the plans for assembly, integration and testing are being detailed. We present an overview of the instrument’s capabilities from a user perspective, and provide a summary of the instrument’s design. We also include recent changes to the project, both technical and programmatic, that have resulted from red-flag actions. Finally, we outline some of the simulated HARMONI observations currently being analyzed.

Published
2022
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2. HARMONI: first light spectroscopy for the ELT: instrument final design and quantitative performance predictions

Author

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

Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Computer science, Integration testing, First light, 01 natural sciences, 010309 optics, Integral field spectrograph, 0103 physical sciences, Systems engineering, Milestone (project management), Extremely Large Telescope, Adaptive optics, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Design review
Abstract

HARMONI is the adaptive optics assisted, near-infrared and visible light integral field spectrograph for the Extremely Large Telescope (ELT). A first light instrument, it provides the work-horse spectroscopic capability for the ELT. As the project approaches its Final Design Review milestone, the design of the instrument is being finalized, and the plans for assembly, integration and testing are being detailed. We present an overview of the instrument's capabilities from a user perspective, provide a summary of the instrument's design, including plans for operations and calibrations, and provide a brief glimpse of the predicted performance for a specific observing scenario. The paper also provides some details of the consortium composition and its evolution since the project commenced in 2015.

Published
2020
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3. The Robotic Multiobject Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI)

Author

Joseph Harry Silber, Parker Fagrelius, Kevin Fanning, Michael Schubnell, Jessica Nicole Aguilar, Steven Ahlen, Jon Ameel, Otger Ballester, Charles Baltay, Chris Bebek, Dominic Benton Beard, Robert Besuner, Laia Cardiel-Sas, Ricard Casas, Francisco Javier Castander, Todd Claybaugh, Carl Dobson, Yutong Duan, Patrick Dunlop, Jerry Edelstein, William T. Emmet, Ann Elliott, Matthew Evatt, Irena Gershkovich, Julien Guy, Stu Harris, Henry Heetderks, Ian Heetderks, Klaus Honscheid, Jose Maria Illa, Patrick Jelinsky, Sharon R. Jelinsky, Jorge Jimenez, Armin Karcher, Stephen Kent, David Kirkby, Jean-Paul Kneib, Andrew Lambert, Mike Lampton, Daniela Leitner, Michael Levi, Jeremy McCauley, Aaron Meisner, Timothy N. Miller, Ramon Miquel, Juliá Mundet, Claire Poppett, David Rabinowitz, Kevin Reil, David Roman, David Schlegel, Santiago Serrano, William Van Shourt, David Sprayberry, Gregory Tarlé, Suk Sien Tie, Curtis Weaverdyck, Kai Zhang, Marco Azzaro, Stephen Bailey, Santiago Becerril, Tami Blackwell, Mohamed Bouri, David Brooks, Elizabeth Buckley-Geer, Jose Peñate Castro, Mark Derwent, Arjun Dey, Govinda Dhungana, Peter Doel, Daniel J. Eisenstein, Nasib Fahim, Juan Garcia-Bellido, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Philipp Hörler, Robert Kehoe, Theodore Kisner, Anthony Kremin, Luzius Kronig, Martin Landriau, Laurent Le Guillou, Paul Martini, John Moustakas, Nathalie Palanque-Delabrouille, Xiyan Peng, Will Percival, Francisco Prada, Carlos Allende Prieto, Guillermo Gonzalez de Rivera, Eusebio Sanchez, Justo Sanchez, Ray Sharples, Marcelle Soares-Santos, Edward Schlafly, Benjamin Alan Weaver, Zhimin Zhou, Yaling Zhu, Hu Zou, and (DESI Collaboration)

Subjects
Dark energy, Astronomical instrumentation, Spectrometers, Galaxy spectroscopy, Astronomy, QB1-991
Abstract

A system of 5020 robotic fiber positioners was installed in 2019 on the Mayall Telescope, at Kitt Peak National Observatory. The robots automatically retarget their optical fibers every 10–20 minutes, each to a precision of several microns, with a reconfiguration time of fewer than 2 minutes. Over the next 5 yr, they will enable the newly constructed Dark Energy Spectroscopic Instrument (DESI) to measure the spectra of 35 million galaxies and quasars. DESI will produce the largest 3D map of the universe to date and measure the expansion history of the cosmos. In addition to the 5020 robotic positioners and optical fibers, DESI’s Focal Plane System includes six guide cameras, four wave front cameras, 123 fiducial point sources, and a metrology camera mounted at the primary mirror. The system also includes associated structural, thermal, and electrical systems. In all, it contains over 675,000 individual parts. We discuss the design, construction, quality control, and integration of all these components. We include a summary of the key requirements, the review and acceptance process, on-sky validations of requirements, and lessons learned for future multiobject, fiber-fed spectrographs.

Published
2022
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