Gaia Data Release 1: Summary of the astrometric, photometric, and survey properties

A. G.A. Brown, Antonella Vallenari, Timo Prusti, J. H.J. De Bruijne, F. Mignard, R. Drimmel, C. Babusiaux, C. A.L. Bailer-Jones, U. Bastian, M. Biermann, D. W. Evans, Laurent Eyer, Florian Jansen, C Jordi, David Katz, S. A. Klioner, U. Lammers, L. Lindegren, X. Luri, W. O'MullaneC. Panem, Dimitri Pourbaix, S. Randich, P. Sartoretti, H. I. Siddiqui, Caroline Soubiran, V. Valette, F. van Leeuwen, N. A. Walton, C. Aerts, F. Arenou, Mark S. Cropper, E. Høg, M. G. Lattanzi, E. K. Grebel, A. D. Holland, C. Huc, X. Passot, M. Perryman, L. Bramante, C. Cacciari, J. Castañeda, L. Chaoul, N. Cheek, F. De Angeli, C. Fabricius, R. Guerra, J. Hernández, A. Jean-Antoine-Piccolo, E Masana, R. Messineo, Nami Mowlavi, K. Nienartowicz, D. Ordóñez-Blanco, Pasquale Panuzzo, J. Portell, P. J. Richards, M. Riello, G. M. Seabroke, P. Tanga, F. Thévenin, J Torra, S. G. Els, G. Gracia-Abril, G. Comoretto, M. Garcia-Reinaldos, T. Lock, E. Mercier, M. Altmann, R. Andrae, T. L. Astraatmadja, I. 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Drazinos, Jose M. Martin-Duran, Y. Dzigan, B. Edvardsson, H. Enke, N. W. Evans, G. Eynard Bontemps, C Fabre, Mauro Fabrizio, S. Faigler, A. J. Falcão, M. Farràs Casas, L. Federici, G. Fedorets, J. D. Hernández-Fernández, P. Fernique, A. Fienga, F. Figueras, F. Filippi, Krzysztof Findeisen, A. Fonti, M. Fouesneau, E. Fraile, M. Fraser, J. Fuchs, Mario Gai, S. Galleti, L. Galluccio, D. Garabato, F. García-Sedano, A. Garofalo, N. Garralda, P. Gavras, J. Gerssen, Rudolf Geyer, G. Gilmore, S. Girona, G. Giuffrida, Claudio M. Gomes, A. González-Marcos, J. González-Núñez, J. J. González-Vidal, M. Granvik, A. Guerrier, P. Guillout, J. Guiraud, A. Gúrpide, R. Gutiérrez-Sánchez, L. P. Guy, R. Haigron, D. Hatzidimitriou, M. Haywood, U. Heiter, A. Helmi, David Hobbs, W. Hofmann, B. Holl, G. Holland, J. A.S. Hunt, A. Hypki, V. Icardi, M. Irwin, G. Jevardat De Fombelle, P. Jofré, P. G. Jonker, A. Jorissen, F. Julbe, A. Karampelas, A. Kochoska, R. Kohley, K. Kolenberg, E. Kontizas, S. E. Koposov, G. 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Terrett, Brandon Tingley, Scott C. Trager, Catherine Turon, Ana Ulla, E. Utrilla, Glauco Tocchini-Valentini, A. Van Elteren, E. Van Hemelryck, Piet W. N. M. van Leeuwen, M. Varadi, A. Vecchiato, J. Veljanoski, T. Via, Julio de Vicente, S Vogt, H. Voss, V. Votruba, S. Voutsinas, G. Walmsley, M. Weiler, K. Weingrill, T. Wevers, L. Wyrzykowski, A. Yoldas, M. Žerjal, S. Zucker, C. Zurbach, T. Zwitter, A. Alecu, M. Allen, C. Allende Prieto, Antonio Amorim, G. Anglada-Escudé, V. Arsenijevic, S. Azaz, P. Balm, M. Beck, H. J. Bernstein, Laurent Bigot, A. Bijaoui, C. Blasco, M. Bonfigli, Giuseppe Bono, S. Boudreault, Alessandro Bressan, Steven S. Brown, P. M. Brunet, P. Bunclark, R. Buonanno, A. G. Butkevich, C. Carret, Carmen M. Carrion, L. Chemin, F. Chéreau, L. Corcione, E. Darmigny, Klas S. De Boer, P. De Teodoro, P Tim de Zeeuw, C. Delle Luche, C. D. Domingues, Pierre Dubath, F. Fodor, B. Frézouls, A. Fries, D. Fustes, D. Fyfe, E. Gallardo, J. Gallegos, D. Gardiol, Marwan Gebran, A. Gomboc, A. Ruiz-Gómez, E. Grux, A. Gueguen, A. Heyrovsky, J. Hoar, G. Iannicola, Y. Isasi Parache, A. M. Janotto, E. Joliet, A. Jonckheere, R. Keil, Dong-Woo Kim, P. Klagyivik, J. Klar, J. Knude, Oleg Kochukhov, I. Kolka, J. Kos, A. Kutka, V. Lainey, D. LeBouquin, C.-J. Liu, D. Loreggia, Valeri V Makarov, M. G. Marseille, C. Martayan, O. Martinez-Rubi, B. Massart, F. Meynadier, S. Mignot, U. Munari, Tuan Anh Nguyen, T. Nordlander, P. Ocvirk, K. S. O'Flaherty, A. Olias Sanz, Pedro L. Ortiz, Juan Iregui Osorio, Dagmara Oszkiewicz, Christos A. Ouzounis, M. Palmer, Phillip H. Park, E. Pasquato, C. Peltzer, J. Peralta, F. Péturaud, T. Pieniluoma, E. Pigozzi, J. Poels, G. Prat, T. Prod'homme, F. Raison, J. M. Rebordao, D. Risquez, B. Rocca-Volmerange, S. Rosen, M. I. Ruiz-Fuertes, F. Russo, S. Sembay, I. Serraller Vizcaino, A. Short, A. Siebert, Hannelore De Silva, D. Sinachopoulos, E. Slezak, M. Soffel, D. Sosnowska, V. Straižys, M. Ter Linden, D. Terrell, Stephan Theil, C. Tiede, L. Troisi, P. Tsalmantza, D. Tur, Mattia Vaccari, F. Vachier, P. Valles, W. Van Hamme, L. Veltz, J. Virtanen, J. M. Wallut, R. Wichmann, M. I. Wilkinson, H. Ziaeepour, S. Zschocke

Publications: Contribution to journalArticlePeer Reviewed

Abstract

Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7.
Aims: A summary of Gaia DR1 is presented along with illustrations of the scientific quality of the data, followed by a discussion of the limitations due to the preliminary nature of this release.
Methods: The raw data collected by Gaia during the first 14 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into an astrometric and photometric catalogue.
Results: Gaia DR1 consists of three components: a primary astrometric data set which contains the positions, parallaxes, and mean proper motions for about 2 million of the brightest stars in common with the Hipparcos and Tycho-2 catalogues - a realisation of the Tycho-Gaia Astrometric Solution (TGAS) - and a secondary astrometric data set containing the positions for an additional 1.1 billion sources. The second component is the photometric data set, consisting of mean G-band magnitudes for all sources. The G-band light curves and the characteristics of 3000 Cepheid and RR Lyrae stars, observed at high cadence around the south ecliptic pole, form the third component. For the primary astrometric data set the typical uncertainty is about 0.3 mas for the positions and parallaxes, and about 1 mas yr-1 for the proper motions. A systematic component of 0.3 mas should be added to the parallax uncertainties. For the subset of 94 000 Hipparcos stars in the primary data set, the proper motions are much more precise at about 0.06 mas yr-1. For the secondary astrometric data set, the typical uncertainty of the positions is 10 mas. The median uncertainties on the mean G-band magnitudes range from the mmag level to
0.03 mag over the magnitude range 5 to 20.7.
Conclusions: Gaia DR1 is an important milestone ahead of the next Gaia data release, which will feature five-parameter astrometry for all sources. Extensive validation shows that Gaia DR1 represents a major advance in the mapping of the heavens and the availability of basic stellar data that underpin observational astrophysics. Nevertheless, the very preliminary nature of this first Gaia data release does lead to a number of important limitations to the data quality which should be carefully considered before drawing conclusions from the data.
Original languageEnglish
Article numberA2
Number of pages23
JournalAstronomy & Astrophysics
Volume595
DOIs
Publication statusPublished - 1 Nov 2016

Austrian Fields of Science 2012

  • 103003 Astronomy
  • 103004 Astrophysics

Keywords

  • Astrometry
  • Catalogs
  • Parallaxes
  • Proper motions
  • Surveys
  • PARALLAXES
  • surveys
  • catalogs
  • parallaxes
  • SKY SURVEY
  • astrometry
  • proper motions
  • ALL-SKY

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