期刊
ASTRONOMY & ASTROPHYSICS
卷 595, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201629512
关键词
catalogs; astrometry; parallaxes; proper motions; surveys
资金
- Algerian Centre de Recherche en Astronomie, Astrophysique et Geophysique of Bouzareah Observatory
- Austrian FWF Hertha Firnberg Programme [T359, P20046, P23737]
- BELgian federal Science Policy Office (BELSPO) through various PROgramme de Developpement d'EXperiences scientifiques (PRODEX) grants
- Brazil-France exchange programme FAPESP-COFECUB
- Brazil-France exchange programme CAPES-COFECUB
- Chinese National Science Foundation [NSFC 11573054]
- Czech-Republic Ministry of Education, Youth, and Sports [L.G. 15010]
- Danish Ministry of Science
- Estonian Ministry of Education and Research [IUT40-1]
- European Commission [MRTN-CT-2006-033481, PIOF-GA-2009-255267, MTKD-CT-2004-014188, FP7-606740, 264895]
- European Research Council (ERC) [320360]
- European Research Council (ERC) through the European Union's Horizon research and innovation programme [670519]
- European Science Foundation (ESF)
- European Space Agency
- European Space Agency Plan for European Cooperating States (PECS) programme
- Czech Space Office through ESA PECS [98058]
- Academy of Finland
- Magnus Ehrnrooth Foundation
- French Centre National de la Recherche Scientifique (CNRS) through action Defi MASTODONS
- French Centre National d'Etudes Spatiales (CNES)
- French Agence Nationale de la Recherche (ANR) [ANR-10-IDEX-0001-02]
- Region Aquitaine
- Universite de Bordeaux
- French Utinam Institute of the Universite de Franche-Comte - Region de Franche-Comte
- Institut des Sciences de l'Univers (INSU)
- German Aerospace Agency (Deutsches Zentrum fur Luft- und Raumfahrt e.V., DLR) [50QG0501, 50QG0601, 50QG0602, 50QG0701, 50QG0901, 50QG1001, 50QG1101, 50QG140, 50QG1401, 50QG1402, 50QG1404]
- Hungarian Academy of Sciences through Lendulet Programme [LP2014-17]
- Hungarian National Research, Development, and Innovation Office [NKFIH K-115709, PD-116175]
- Israel Ministry of Science and Technology [3-9082]
- Agenzia Spaziale Italiana (ASI) [I/037/08/0, I/058/10/0, 2014-025-R.0, 2014-025-R.1.2015, I/008/10/0, 2013/030/I.0]
- Italian Istituto Nazionale di Astrofisica (INAF)
- Netherlands Organisation for Scientific Research (NWO) [NWO-M-614.061.414]
- Netherlands Research School for Astronomy (NOVA)
- Polish National Science Centre through HARMONIA grant [2015/18/M/ST9/00544]
- Portugese Fundacao para a Ciencia e a Tecnologia (FCT) [PTDC/CTE-SPA/118692/2010, PDCTE/CTE-AST/81711/2003, SFRH/BPD/74697/2010]
- Slovenian Research Agency
- Spanish Ministry of Economy MINECO-FEDER [AyA2014-55216, AyA2011-24052, ESP2013-48318-C2-R, ESP2014-55996-C2-R]
- ICCUB (Unidad de Excelencia Maria de Maeztu) [MDM-2014-0369]
- Swedish National Space Board (SNSB/Rymdstyrelsen)
- Swiss State Secretariat for Education, Research, and Innovation
- Swiss National Science Foundation
- Early Postdoc.Mobility fellowship
- United Kingdom Rutherford Appleton Laboratory
- United Kingdom Science and Technology Facilities Council (STFC) [PP/C506756/1, ST/I00047X/1]
- United Kingdom Space Agency (UKSA) [ST/K000578/1, ST/N000978/1]
- Robert Martin Ayers Sciences Fund
- National Aeronautics and Space Administration
- National Science Foundation
- [PEst-OE/AMB/UI4006/2011]
- [UID/FIS/00099/2013]
- [UID/EEA/00066/2013]
- Fundação para a Ciência e a Tecnologia [PTDC/CTE-SPA/118692/2010, UID/EEA/00066/2013, PDCTE/CTE-AST/81711/2003] Funding Source: FCT
- Science and Technology Facilities Council [ST/M000966/1, ST/N004493/1, 1143608] Funding Source: researchfish
- UK Space Agency [ST/I00064X/1, PP/D006791/2] Funding Source: researchfish
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 similar to 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 similar to 0.3 mas should be added to the parallax uncertainties. For the subset of similar to 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 similar to 10 mas. The median uncertainties on the mean G-band magnitudes range from the mmag level to similar 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.
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