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2. LISA Pathfinder platform stability and drag-free performance

Author

Armano, M, Audley, H, Baird, J, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, A M, Danzmann, K, De Deus Silva, M, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E D, Freschi, M, Gesa, L, Gibert, F, Giardini, D, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, and Et Al

Published
2019
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4. Laser Interferometer Space Antenna

Author

Amaro-Seoane, P, Audley, H, Babak, S, Baker, J, Barausse, E, Bender, P, Berti, E, Binetruy, P, Born, M, Bortoluzzi, D, Camp, J, Caprini, C, Cardoso, V, Colpi, M, Conklin, J, Cornish, N, Cutler, C, Danzmann, K, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E, Gair, J, Bote, LG, Giardini, D, Gibert, F, Grimani, C, Halloin, H, Heinzel, G, Hertog, T, Hewitson, M, Holley-Bockelmann, K, Hollington, D, Hueller, M, Inchauspe, H, Jetzer, P, Karnesis, N, Killow, C, Klein, A, Klipstein, B, Korsakova, N, Larson, SL, Livas, J, Lloro, I, Man, N, Mance, D, Martino, J, Mateos, I, McKenzie, K, McWilliams, ST, Miller, C, Mueller, G, Nardini, G, Nelemans, G, Nofrarias, M, Petiteau, A, Pivato, P, Plagnol, E, Porter, E, Reiche, J, Robertson, D, Robertson, N, Rossi, E, Russano, G, Schutz, B, Sesana, A, Shoemaker, D, Slutsky, J, Sopuerta, CF, Sumner, T, Tamanini, N, Thorpe, I, Troebs, M, Vallisneri, M, Vecchio, A, Vetrugno, D, Vitale, S, Volonteri, M, Wanner, G, Ward, H, Wass, P, Weber, W, Ziemer, J, and Zweifel, P

Subjects
General Relativity and Quantum Cosmology, Physics::Space Physics, Astrophysics::Instrumentation and Methods for Astrophysics, astro-ph.IM
Abstract

Following the selection of The Gravitational Universe by ESA, and the successful flight of LISA Pathfinder, the LISA Consortium now proposes a 4 year mission in response to ESA's call for missions for L3. The observatory will be based on three arms with six active laser links, between three identical spacecraft in a triangular formation separated by 2.5 million km. LISA is an all-sky monitor and will offer a wide view of a dynamic cosmos using Gravitational Waves as new and unique messengers to unveil The Gravitational Universe. It provides the closest ever view of the infant Universe at TeV energy scales, has known sources in the form of verification binaries in the Milky Way, and can probe the entire Universe, from its smallest scales near the horizons of black holes, all the way to cosmological scales. The LISA mission will scan the entire sky as it follows behind the Earth in its orbit, obtaining both polarisations of the Gravitational Waves simultaneously, and will measure source parameters with astrophysically relevant sensitivity in a band from below $10^{-4}\,$Hz to above $10^{-1}\,$Hz.

Published
2017

5. Bayesian statistics for the calibration of the LISA Pathfinder experiment

Author

Armano, M., Audley, H., Auger, G., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Bursi, A., Caleno, M., Cavalleri, A., Cesarini, A., Cruise, M., Danzmann, K., Diepholz, I., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fitzsimons, E., Freschi, M., Gallegos, J., Marirrodriga, C., Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hueller, M., Huesler, J., Inchauspé, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C., Lloro, I., Maarschalkerweerd, R., Madden, S., Mance, D., Martín, V., Martin-Porqueras, F., Mateos, I., McNamara, P., Mendes, J., Mendes, L., Moroni, A., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Ramos-Castro, J., Reiche, J., Romera Perez, J., Robertson, D., Rozemeijer, H., Russano, G., Sarra, P., Schleicher, A., Slutsky, J., Sopuerta, C., Sumner, T., Texier, D., Thorpe, J., Trenkel, C., Tu, H., Vitale, S., Wanner, G., Ward, H., Waschke, S., Wass, P., Wealthy, D., Wen, S., Weber, W., Wittchen, A., Zanoni, C., Ziegler, T., and Zweifel, P.

Published
2015

6. A Strategy to Characterize the LISA-Pathfinder Cold Gas Thruster System

Author

Armano, M., Audley, H., Auger, G., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Bursi, A., Caleno, M., Cavalleri, A., Cesarini, A., Cruise, M., Cutler, C., Danzmann, K., Diepholz, I., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fitzsimons, E., Freschi, M., Gallegos, J., Marirrodriga, C., Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hueller, M., Huesler, J., Inchauspe, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C., Lloro, I., Maarschalkerweerd, R., Madden, S., Maghami, P., Mance, D., Martin, V., Martin-Porqueras, F., Mateos, I., McNamara, P., Mendes, J., Mendes, L., Moroni, A., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Ramos-Castro, J., Reiche, J., Perez, J., Robertson, D., Rozemeijer, H., Russano, G., Sarra, P., Schleicher, A., Slutsky, J., Sopuerta, C., Sumner, T., Texier, D., Thorpe, J., Trenkel, C., Tu, H., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Waschke, S., Wass, P., Wealthy, D., Wen, S., Weber, W., Wittchen, A., Zanoni, C., Ziegler, T., and Zweifel, P.

Subjects
Physics, History, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics, Cold gas thruster, Computer Science Applications, Education, Pathfinder, Amplitude, Component (UML), Physics::Space Physics, Aerospace engineering, business
Abstract

The LISA Pathfinder mission will demonstrate the technology of drag-free test masses for use as inertial references in future space-based gravitational wave detectors. To accomplish this, the Pathfinder spacecraft will perform drag-free flight about a test mass while measuring the acceleration of this primary test mass relative to a second reference test mass. Because the reference test mass is contained within the same spacecraft, it is necessary to apply forces on it to maintain its position and attitude relative to the spacecraft. These forces are a potential source of acceleration noise in the LISA Pathfinder system that are not present in the full LISA configuration. While LISA Pathfinder has been designed to meet it's primary mission requirements in the presence of this noise, recent estimates suggest that the on-orbit performance may be limited by this `suspension noise'. The drift-mode or free-flight experiments provide an opportunity to mitigate this noise source and further characterize the underlying disturbances that are of interest to the designers of LISA-like instruments. This article provides a high-level overview of these experiments and the methods under development to analyze the resulting data.

Published
2015

7. LISA Pathfinder: mission and status

Author

Antonucci, F, Armano, M, Audley, H, Auger, G, Benedetti, M, Binetruy, P, Boatella, C, Bogenstahl, J, Bortoluzzi, D, Bosetti, P, Caleno, M, Cavalleri, A, Cesa, M, Chmeissani, M, Ciani, G, Conchillo, A, Congedo, G, Cristofolini, I, Cruise, M, Danzmann, K, De Marchi, F, Diaz-Aguilo, M, Diepholz, I, Dixon, G, Dolesi, R, Dunbar, N, Fauste, J, Ferraioli, L, Fertin, D, Fichter, W, Fitzsimons, E, Freschi, M, Marin, AG, Marirrodriga, CG, Gerndt, R, Gesa, L, Gilbert, F, Giardini, D, Grimani, C, Grynagier, A, Guillaume, B, Guzmán, F, Harrison, I, Heinzel, G, Hewitson, M, Hollington, D, Hough, J, Hoyland, D, Hueller, M, Huesler, J, Jeannin, O, Jennrich, O, Jetzer, P, Johlander, B, Killow, C, Llamas, X, Lloro, I, Lobo, A, Maarschalkerweerd, R, Madden, S, Mance, D, Mateos, I, McNamara, PW, Mendes, J, Mitchell, E, Monsky, A, Nicolini, D, Nicolodi, D, Nofrarias, M, Pedersen, F, Perreur-Lloyd, M, Perreca, A, Plagnol, E, Prat, P, Racca, GD, Rais, B, Ramos-Castro, J, Reiche, J, Perez, JAR, Robertson, D, Rozemeijer, H, Sanjuan, J, Schleicher, A, Schulte, M, Shaul, D, Stagnaro, L, Strandmoe, S, Steier, F, Sumner, TJ, Taylor, A, Texier, D, Trenkel, C, Tombolato, D, Vitale, S, Wanner, G, Ward, H, Waschke, S, Wass, P, Weber, WJ, Zweifel, P, Gruppo Collegato di Trento, National Institute for Nuclear Physics ( INFN ), European Space Astronomy Centre, European Space Agency ( ESA ), Max-Planck-Institut für Gravitationsphysik, Universitat Hannover, AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Centre National d'Etudes Spatiales ( CNES ), European Space Technology Centre, IFAE, Universitat Autònoma de Barcelona [Barcelona] ( UAB ), Department of Physics [Gainesville], University of Florida [Gainesville], ICE, Institut d'Estudis Espacials de Catalunya ( IEEC-CSIC ), School of Physics and Astronomy [Birmingham], University of Birmingham [Birmingham], EPSC, Astrium Ltd, Institut für Flugmechanik und Flugregelung, Department of Physics and Astronomy, University of Glasgow, Astrium GmbH, Institut für Geophysik [Zürich], Eidgenössische Technische Hochschule [Zürich] ( ETH Zürich ), Istituto di Fisica, NASA Goddard Space Flight Center ( GSFC ), European Space Operations Centre, Blackett Laboratory, Imperial College London, Institut für Theoretische Physik, Universität Zürich [Zürich] ( UZH ), NTE-SENER, Departament d'Enginyeria Electrònica [Barcelona], Istituto Nazionale di Fisica Nucleare (INFN), European Space Astronomy Centre (ESAC), Agence Spatiale Européenne = European Space Agency (ESA), Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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), Centre National d'Études Spatiales [Toulouse] (CNES), European Space Research and Technology Centre (ESTEC), Institut de Física d’Altes Energies [Barcelone] (IFAE), Universitat Autònoma de Barcelona (UAB), Department of Physics [Gainesville] (UF|Physics), University of Florida [Gainesville] (UF), Institut d'Estudis Espacials de Catalunya (IEEC-CSIC), SUPA School of Physics and Astronomy [Glasgow], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), NASA Goddard Space Flight Center (GSFC), Universität Zürich [Zürich] = University of Zurich (UZH), National Institute for Nuclear Physics (INFN), European Space Agency (ESA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Universitat Autònoma de Barcelona [Barcelona] (UAB), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Universität Zürich [Zürich] (UZH), Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics and Astronomy (miscellaneous), Physical Sciences, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], ComputingMilieux_MISCELLANEOUS, [ PHYS.GRQC ] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]
Abstract

LISA Pathfinder, the second of the European Space Agency's Small Missions for Advanced Research in Technology (SMART), is a dedicated technology demonstrator for the joint ESA/NASA Laser Interferometer Space Antenna (LISA) mission. The technologies required for LISA are many and extremely challenging. This coupled with the fact that some flight hardware cannot be fully tested on ground due to Earth-induced noise led to the implementation of the LISA Pathfinder mission to test the critical LISA technologies in a flight environment. LISA Pathfinder essentially mimics one arm of the LISA constellation by shrinking the 5 million kilometre armlength down to a few tens of centimetres, giving up the sensitivity to gravitational waves, but keeping the measurement technology: the distance between the two test masses is measured using a laser interferometric technique similar to one aspect of the LISA interferometry system. The scientific objective of the LISA Pathfinder mission consists then of the first in-flight test of low frequency gravitational wave detection metrology. LISA Pathfinder is due to be launched in 2013 on-board a dedicated small launch vehicle (VEGA). After a series of apogee raising manoeuvres using an expendable propulsion module, LISA Pathfinder will enter a transfer orbit towards the first Sun-Earth Lagrange point (L1). After separation from the propulsion module, the LPF spacecraft will be stabilized using the micro-Newton thrusters, entering a 500 000 km by 800 000 km Lissajous orbit around L1. Science results will be available approximately 2 months after launch. © 2011 IOP Publishing Ltd.

Published
2011

8. State Space Modelling and Data Analysis Exercises in LISA Pathfinder

Author

Nofrarias, M., Antonucci, F., Armano, M., Audley, H., Auger, G., Benedetti, M., Binetruy, P., Bogenstahl, J., Bortoluzzi, D., Brandt, N., Caleno, M., Cavalleri, A., Giuseppe Congedo, Cruise, M., Danzmann, K., Marchi, F., Diaz-Aguilo, M., Diepholz, I., Dixon, G., Dolesi, R., Dunbar, N., Fauste, J., Ferraioli, L., Ferroni, V., Fichter, W., Fitzsimons, E., Freschi, M., Marirrodriga, C. Garcia, Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Grimani, C., Grynagier, A., Guzman, F., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Huesler, J., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Korsakova, N., Killow, C., Llamas, X., Lloro, I., Lobo, A., Maarschalkerweerd, R., Madden, S., Mance, D., Martin, V., Mateos, I., Mcnamara, P., Mendes, I., Mitchell, E., Nicolodi, D., Perreur-Lloyd, M., Plagnol, E., Prat, P., Ramos-Castro, J., Reiche, J., Perez, J. A. Romera, Robertson, D., Rozemeijer, H., Rossano, G., Schleicher, A., Shaul, D., Sopuerta, C. F., Sumner, T. J., Taylor, A., Texier, D., Trenkel, C., Tu, H. B., Vitale, S., Wanner, G., Ward, H., Waschke, S., Wass, P., Wealthy, D., Wen, S., Weber, W., Ziegler, T., and Zweifel, P.

Subjects
Physics - Instrumentation and Detectors, Physics - Data Analysis, Statistics and Probability, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), General Relativity and Quantum Cosmology, Data Analysis, Statistics and Probability (physics.data-an)
Abstract

LISA Pathfinder is a mission planned by the European Space Agency to test the key technologies that will allow the detection of gravitational waves in space. The instrument on-board, the LISA Technology package, will undergo an exhaustive campaign of calibrations and noise characterisation campaigns in order to fully describe the noise model. Data analysis plays an important role in the mission and for that reason the data analysis team has been developing a toolbox which contains all the functionalities required during operations. In this contribution we give an overview of recent activities, focusing on the improvements in the modelling of the instrument and in the data analysis campaigns performed both with real and simulated data., Comment: Plenary talk presented at the 9th International LISA Symposium, 21-25 May 2012, Paris

9. LISA PATHFINDER FIRST STEP TOWARD A GRAVITATIONAL WAVE SPACE OBSERVATORY

Author

Bassan, M., Armano, M., Audley, H., Auger, G., Baird, J. T., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Caleno, M., Carbone, L., Cavalleri, A., Cesarini, A., Ciani, G., Congedo, G., Cruise, A. M., Danzmann, K., Deus Silva, M., Rosario De Rosa, Di Fiore, L., Diaz-Aguiló, M., Diepholz, I., Dixon, G., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Flatscher, R., Freschi, M., Garcia Marín, A., García Marrirodriga, C., Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grado, A., Grimani, C., Grynagier, A., Grzymisch, J., Guzman, F., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Madden, S., Mateos, I., Mcnamara, P. W., Mendes, J., Mendes, L., Monsky, A., Nicolodi, D., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Raïs, B., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rozemeijer, H., Rivas, F., Russano, G., Sanjuan, J., Sarra, P., Schleicher, A., Shaul, D., Slutsky, J., Sopuerta, C. F., Stanga, R., Steier, F., Sumner, T., Texier, D., Thorpe, J. I., Trenkel, C., Tröbs, M., Tu, H. B., Vetrugno, D., Vitale, S., Wand, V., Wanner, G., Ward, H., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., Zambotti, A., Zanoni, C., Ziegler, T., and Zweifel, P.

10. The Gravitational Universe

Author

Consortium, The Elisa, Seoane, P. Amaro, Aoudia, S., Audley, H., Auger, G., Babak, S., Baker, J., Barausse, E., Barke, S., Bassan, M., Beckmann, V., Benacquista, M., Bender, P. L., Berti, E., Binétruy, P., Bogenstahl, J., Bonvin, C., Bortoluzzi, D., Brause, N. C., Brossard, J., Buchman, S., Bykov, I., Camp, J., Caprini, C., Cavalleri, A., Cerdonio, M., Ciani, G., Colpi, M., Congedo, G., Conklin, J., Cornish, N., Danzmann, K., Vine, G., Debra, D., Dewi Freitag, M., Di Fiore, L., Diaz Aguilo, M., Diepholz, I., Dolesi, R., Dotti, M., Fernández Barranco, G., Ferraioli, L., Ferroni, V., Finetti, N., Fitzsimons, E., Gair, J., Galeazzi, F., Garcia, A., Gerberding, O., Gesa, L., Giardini, D., Gibert, F., Grimani, C., Paul Groot, Guzman Cervantes, F., Haiman, Z., Halloin, H., Heinzel, G., Hewitson, M., Hogan, C., Holz, D., Hornstrup, A., Hoyland, D., Hoyle, C. D., Hueller, M., Hughes, S., Jetzer, P., Kalogera, V., Karnesis, N., Kilic, M., Killow, C., Klipstein, W., Kochkina, E., Korsakova, N., Krolak, A., Larson, S., Lieser, M., Littenberg, T., Livas, J., Lloro, I., Mance, D., Madau, P., Maghami, P., Mahrdt, C., Marsh, T., Mateos, I., Mayer, L., Mcclelland, D., Mckenzie, K., Mcwilliams, S., Merkowitz, S., Miller, C., Mitryk, S., Moerschell, J., Mohanty, S., Monsky, A., Mueller, G., Müller, V., Nelemans, G., Nicolodi, D., Nissanke, S., Nofrarias, M., Numata, K., Ohme, F., Otto, M., Perreur-Lloyd, M., Petiteau, A., Phinney, E. S., Plagnol, E., Pollack, S., Porter, E., Prat, P., Preston, A., Prince, T., Reiche, J., Richstone, D., Robertson, D., Rossi, E. M., Rosswog, S., Rubbo, L., Ruiter, A., Sanjuan, J., Sathyaprakash, B. S., Schlamminger, S., Schutz, B., Schütze, D., Sesana, A., Shaddock, D., Shah, S., Sheard, B., Sopuerta, C. F., Spector, A., Spero, R., Stanga, R., Stebbins, R., Stede, G., Steier, F., Sumner, T., Sun, K. -X, Sutton, A., Tanaka, T., Tanner, D., Thorpe, I., Tröbs, M., Tinto, M., Tu, H. -B, Vallisneri, M., Vetrugno, D., Vitale, S., Volonteri, M., Wand, V., Wang, Y., Wanner, G., Ward, H., Ware, B., Wass, P., Weber, W. J., Yu, Y., Yunes, N., and Zweifel, P.

Subjects
General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, General Relativity and Quantum Cosmology (gr-qc), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The last century has seen enormous progress in our understanding of the Universe. We know the life cycles of stars, the structure of galaxies, the remnants of the big bang, and have a general understanding of how the Universe evolved. We have come remarkably far using electromagnetic radiation as our tool for observing the Universe. However, gravity is the engine behind many of the processes in the Universe, and much of its action is dark. Opening a gravitational window on the Universe will let us go further than any alternative. Gravity has its own messenger: Gravitational waves, ripples in the fabric of spacetime. They travel essentially undisturbed and let us peer deep into the formation of the first seed black holes, exploring redshifts as large as z ~ 20, prior to the epoch of cosmic re-ionisation. Exquisite and unprecedented measurements of black hole masses and spins will make it possible to trace the history of black holes across all stages of galaxy evolution, and at the same time constrain any deviation from the Kerr metric of General Relativity. eLISA will be the first ever mission to study the entire Universe with gravitational waves. eLISA is an all-sky monitor and will offer a wide view of a dynamic cosmos using gravitational waves as new and unique messengers to unveil The Gravitational Universe. It provides the closest ever view of the early processes at TeV energies, has guaranteed sources in the form of verification binaries in the Milky Way, and can probe the entire Universe, from its smallest scales around singularities and black holes, all the way to cosmological dimensions., Comment: 20 pages; submitted to the European Space Agency on May 24th, 2013 for the L2/L3 selection of ESA's Cosmic Vision program

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