Summary of the contents and survey properties

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Summary of the contents and survey properties. / Gaia Collaboration.

In: Astronomy & Astrophysics, Vol. 616, 1, 10.08.2018.

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Gaia Collaboration 2018, 'Summary of the contents and survey properties', Astronomy & Astrophysics, vol. 616, 1. https://doi.org/10.1051/0004-6361/201833051

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Gaia Collaboration (2018). Summary of the contents and survey properties. Astronomy & Astrophysics, 616, [1]. https://doi.org/10.1051/0004-6361/201833051

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Gaia Collaboration. 2018. Summary of the contents and survey properties. Astronomy & Astrophysics. 616. https://doi.org/10.1051/0004-6361/201833051

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Gaia Collaboration. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018 Aug 10;616. 1. https://doi.org/10.1051/0004-6361/201833051

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Gaia Collaboration. / Summary of the contents and survey properties. In: Astronomy & Astrophysics. 2018 ; Vol. 616.

Bibtex

@article{c8a66bebeed04b70a2b324a99fa716f9,
title = "Summary of the contents and survey properties",
abstract = "Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21. In addition epoch astrometry and photometry are provided for a modest sample of minor planets in the solar system.Aims. A summary of the contents of Gaia DR2 is presented, accompanied by a discussion on the differences with respect to Gaia DR1 and an overview of the main limitations which are still present in the survey. Recommendations are made on the responsible use of Gaia DR2 results.Methods. The raw data collected with the Gaia instruments during the first 22 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into this second data release, which represents a major advance with respect to Gaia DR1 in terms of completeness, performance, and richness of the data products.Results. Gaia DR2 contains celestial positions and the apparent brightness in G for approximately 1.7 billion sources. For 1.3 billion of those sources, parallaxes and proper motions are in addition available. The sample of sources for which variability information is provided is expanded to 0 : 5 million stars. This data release contains four new elements: broad-band colour information in the form of the apparent brightness in the G(BP) (330-680 nm) and G(RP) (630-1050 nm) bands is available for 1.4 billion sources; median radial velocities for some 7 million sources are presented; for between 77 and 161 million sources estimates are provided of the stellar effective temperature, extinction, reddening, and radius and luminosity; and for a pre-selected list of 14 000 minor planets in the solar system epoch astrometry and photometry are presented. Finally, Gaia DR2 also represents a new materialisation of the celestial reference frame in the optical, the Gaia-CRF2, which is the first optical reference frame based solely on extragalactic sources. There are notable changes in the photometric system and the catalogue source list with respect to Gaia DR1, and we stress the need to consider the two data releases as independent.Conclusions. Gaia DR2 represents a major achievement for the Gaia mission, delivering on the long standing promise to provide parallaxes and proper motions for over 1 billion stars, and representing a first step in the availability of complementary radial velocity and source astrophysical information for a sample of stars in the Gaia survey which covers a very substantial fraction of the volume of our galaxy.",
keywords = "catalogs, astrometry, techniques: radial velocities, stars: fundamental parameters, stars: variables: general, minor planets, asteroids: general, SKY SURVEY 2MASS, CATALOG, STARS, DATABASE",
author = "Brown, {A. G. A.} and A. Vallenari and T. Prusti and {de Bruijne}, {J. H. J.} and C. Babusiaux and Bailer-Jones, {C. A. L.} and M. Biermann and Evans, {D. W.} and L. Eyer and F. Jansen and C. Jordi and Klioner, {S. A.} and U. Lammers and L. Lindegren and X. Luri and F. Mignard and C. Panem and D. Pourbaix and S. Randich and P. Sartoretti and Siddiqui, {H. I.} and C. Soubiran and {van Leeuwen}, F. and Walton, {N. A.} and F. Arenou and U. Bastian and M. Cropper and R. Drimmel and D. Katz and Lattanzi, {M. G.} and J. Bakker and C. Cacciari and J. Castaneda and L. Chaoul and N. Cheek and {De Angeli}, F. and C. Fabricius and R. Guerra and B. Holl and E. Masana and R. Messineo and N. Mowlavi and K. Nienartowicz and P. Panuzzo and J. Portell and M. Riello and Seabroke, {G. M.} and P. Tanga and {von Essen}, C. and H. Voss and {Gaia Collaboration}",
year = "2018",
month = "8",
day = "10",
doi = "10.1051/0004-6361/201833051",
language = "English",
volume = "616",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Summary of the contents and survey properties

AU - Brown, A. G. A.

AU - Vallenari, A.

AU - Prusti, T.

AU - de Bruijne, J. H. J.

AU - Babusiaux, C.

AU - Bailer-Jones, C. A. L.

AU - Biermann, M.

AU - Evans, D. W.

AU - Eyer, L.

AU - Jansen, F.

AU - Jordi, C.

AU - Klioner, S. A.

AU - Lammers, U.

AU - Lindegren, L.

AU - Luri, X.

AU - Mignard, F.

AU - Panem, C.

AU - Pourbaix, D.

AU - Randich, S.

AU - Sartoretti, P.

AU - Siddiqui, H. I.

AU - Soubiran, C.

AU - van Leeuwen, F.

AU - Walton, N. A.

AU - Arenou, F.

AU - Bastian, U.

AU - Cropper, M.

AU - Drimmel, R.

AU - Katz, D.

AU - Lattanzi, M. G.

AU - Bakker, J.

AU - Cacciari, C.

AU - Castaneda, J.

AU - Chaoul, L.

AU - Cheek, N.

AU - De Angeli, F.

AU - Fabricius, C.

AU - Guerra, R.

AU - Holl, B.

AU - Masana, E.

AU - Messineo, R.

AU - Mowlavi, N.

AU - Nienartowicz, K.

AU - Panuzzo, P.

AU - Portell, J.

AU - Riello, M.

AU - Seabroke, G. M.

AU - Tanga, P.

AU - von Essen, C.

AU - Voss, H.

AU - Gaia Collaboration

PY - 2018/8/10

Y1 - 2018/8/10

N2 - Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21. In addition epoch astrometry and photometry are provided for a modest sample of minor planets in the solar system.Aims. A summary of the contents of Gaia DR2 is presented, accompanied by a discussion on the differences with respect to Gaia DR1 and an overview of the main limitations which are still present in the survey. Recommendations are made on the responsible use of Gaia DR2 results.Methods. The raw data collected with the Gaia instruments during the first 22 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into this second data release, which represents a major advance with respect to Gaia DR1 in terms of completeness, performance, and richness of the data products.Results. Gaia DR2 contains celestial positions and the apparent brightness in G for approximately 1.7 billion sources. For 1.3 billion of those sources, parallaxes and proper motions are in addition available. The sample of sources for which variability information is provided is expanded to 0 : 5 million stars. This data release contains four new elements: broad-band colour information in the form of the apparent brightness in the G(BP) (330-680 nm) and G(RP) (630-1050 nm) bands is available for 1.4 billion sources; median radial velocities for some 7 million sources are presented; for between 77 and 161 million sources estimates are provided of the stellar effective temperature, extinction, reddening, and radius and luminosity; and for a pre-selected list of 14 000 minor planets in the solar system epoch astrometry and photometry are presented. Finally, Gaia DR2 also represents a new materialisation of the celestial reference frame in the optical, the Gaia-CRF2, which is the first optical reference frame based solely on extragalactic sources. There are notable changes in the photometric system and the catalogue source list with respect to Gaia DR1, and we stress the need to consider the two data releases as independent.Conclusions. Gaia DR2 represents a major achievement for the Gaia mission, delivering on the long standing promise to provide parallaxes and proper motions for over 1 billion stars, and representing a first step in the availability of complementary radial velocity and source astrophysical information for a sample of stars in the Gaia survey which covers a very substantial fraction of the volume of our galaxy.

AB - Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21. In addition epoch astrometry and photometry are provided for a modest sample of minor planets in the solar system.Aims. A summary of the contents of Gaia DR2 is presented, accompanied by a discussion on the differences with respect to Gaia DR1 and an overview of the main limitations which are still present in the survey. Recommendations are made on the responsible use of Gaia DR2 results.Methods. The raw data collected with the Gaia instruments during the first 22 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into this second data release, which represents a major advance with respect to Gaia DR1 in terms of completeness, performance, and richness of the data products.Results. Gaia DR2 contains celestial positions and the apparent brightness in G for approximately 1.7 billion sources. For 1.3 billion of those sources, parallaxes and proper motions are in addition available. The sample of sources for which variability information is provided is expanded to 0 : 5 million stars. This data release contains four new elements: broad-band colour information in the form of the apparent brightness in the G(BP) (330-680 nm) and G(RP) (630-1050 nm) bands is available for 1.4 billion sources; median radial velocities for some 7 million sources are presented; for between 77 and 161 million sources estimates are provided of the stellar effective temperature, extinction, reddening, and radius and luminosity; and for a pre-selected list of 14 000 minor planets in the solar system epoch astrometry and photometry are presented. Finally, Gaia DR2 also represents a new materialisation of the celestial reference frame in the optical, the Gaia-CRF2, which is the first optical reference frame based solely on extragalactic sources. There are notable changes in the photometric system and the catalogue source list with respect to Gaia DR1, and we stress the need to consider the two data releases as independent.Conclusions. Gaia DR2 represents a major achievement for the Gaia mission, delivering on the long standing promise to provide parallaxes and proper motions for over 1 billion stars, and representing a first step in the availability of complementary radial velocity and source astrophysical information for a sample of stars in the Gaia survey which covers a very substantial fraction of the volume of our galaxy.

KW - catalogs

KW - astrometry

KW - techniques: radial velocities

KW - stars: fundamental parameters

KW - stars: variables: general

KW - minor planets, asteroids: general

KW - SKY SURVEY 2MASS

KW - CATALOG

KW - STARS

KW - DATABASE

U2 - 10.1051/0004-6361/201833051

DO - 10.1051/0004-6361/201833051

M3 - Journal article

VL - 616

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - 1

ER -