Summary of the contents and survey properties

Brown, A. G.A.; Vallenari, A.; Prusti, T.; De Bruijne, J. H.J.; Babusiaux, C.; Bailer-Jones, C. A.L.; Biermann, M.; Evans, D. W.; Eyer, L.; Jansen, F.; Jordi, C.; Klioner, S. A.; Lammers, U.; Lindegren, L.; Luri, X.; Mignard, F.; Panem, C.; Pourbaix, D.; Randich, S.; Sartoretti, P.; Siddiqui, H. I.; Soubiran, C.; Van Leeuwen, F.; Walton, N. A.; Arenou, F.; Bastian, U.; Cropper, M.; Drimmel, R.; Katz, D.; Lattanzi, M. G.; Bakker, J.; Cacciari, C.; Castañeda, J.; Chaoul, L.; Cheek, N.; De Angeli, F.; Fabricius, C.; Guerra, R.; Holl, B.; Masana, E.; Messineo, R.; Mowlavi, N.; Nienartowicz, K.; Panuzzo, P.; Portell, J.; Riello, M.; Seabroke, G. M.; Hobbs, D.; McMillan, P. J.; Michalik, D.

Summary of the contents and survey properties

Mark

Brown, A. G.A. ; Vallenari, A. ; Prusti, T. ; De Bruijne, J. H.J. ; Babusiaux, C. ; Bailer-Jones, C. A.L. ; Biermann, M. ; Evans, D. W. ; Eyer, L. and Jansen, F. , et al. (2018) In Astronomy and Astrophysics 616.

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... (More); 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.
(Less)

Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/9e1c5d35-bea3-4b54-be8c-5a6025dcaeb5

author

Brown, A. G.A. ; Vallenari, A. ; Prusti, T. ; De Bruijne, J. H.J. ; Babusiaux, C. ; Bailer-Jones, C. A.L. ; Biermann, M. ; Evans, D. W. ; Eyer, L. and Jansen, F. , et al. (More)

Brown, A. G.A. ; Vallenari, A. ; Prusti, T. ; De Bruijne, J. H.J. ; Babusiaux, C. ; Bailer-Jones, C. A.L. ; Biermann, M. ; Evans, D. W. ; Eyer, L. ; Jansen, F. ; Jordi, C. ; Klioner, S. A. ; Lammers, U. ; Lindegren, L. ^LU

; Luri, X. ; Mignard, F. ; Panem, C. ; Pourbaix, D. ; Randich, S. ; Sartoretti, P. ; Siddiqui, H. I. ; Soubiran, C. ; Van Leeuwen, F. ; Walton, N. A. ; Arenou, F. ; Bastian, U. ; Cropper, M. ; Drimmel, R. ; Katz, D. ; Lattanzi, M. G. ; Bakker, J. ; Cacciari, C. ; Castañeda, J. ; Chaoul, L. ; Cheek, N. ; De Angeli, F. ; Fabricius, C. ; Guerra, R. ; Holl, B. ; Masana, E. ; Messineo, R. ; Mowlavi, N. ; Nienartowicz, K. ; Panuzzo, P. ; Portell, J. ; Riello, M. ; Seabroke, G. M. ; Hobbs, D. ^LU

; McMillan, P. J. ^LU

and Michalik, D. ^LU (Less)

author collaboration

GAIA Collaboration

organization

Lund Observatory - Has been reorganised

publishing date

2018-01-01

type

Contribution to journal

publication status

published

subject

Astronomy, Astrophysics and Cosmology

keywords

Asteroids: general, Astrometry, Catalogs, Minor planets, Stars: fundamental parameters, Stars: variables: general, Techniques: radial velocities

in

Astronomy and Astrophysics

volume

616

article number

A1

publisher

EDP Sciences

external identifiers

scopus:85050262252

ISSN

0004-6361

DOI

10.1051/0004-6361/201833051

language

English

LU publication?

yes

id

9e1c5d35-bea3-4b54-be8c-5a6025dcaeb5

date added to LUP

2019-02-08 14:08:54

date last changed

2024-04-15 22:54:24

@article{9e1c5d35-bea3-4b54-be8c-5a6025dcaeb5,
  abstract     = {{<p>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<sub>BP</sub> (330-680 nm) and G<sub>RP</sub> (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.</p>}},
  author       = {{Brown, A. G.A. and Vallenari, A. and Prusti, T. and De Bruijne, J. H.J. and Babusiaux, C. and Bailer-Jones, C. A.L. and Biermann, M. and Evans, D. W. and Eyer, L. and Jansen, F. and Jordi, C. and Klioner, S. A. and Lammers, U. and Lindegren, L. and Luri, X. and Mignard, F. and Panem, C. and Pourbaix, D. and Randich, S. and Sartoretti, P. and Siddiqui, H. I. and Soubiran, C. and Van Leeuwen, F. and Walton, N. A. and Arenou, F. and Bastian, U. and Cropper, M. and Drimmel, R. and Katz, D. and Lattanzi, M. G. and Bakker, J. and Cacciari, C. and Castañeda, J. and Chaoul, L. and Cheek, N. and De Angeli, F. and Fabricius, C. and Guerra, R. and Holl, B. and Masana, E. and Messineo, R. and Mowlavi, N. and Nienartowicz, K. and Panuzzo, P. and Portell, J. and Riello, M. and Seabroke, G. M. and Hobbs, D. and McMillan, P. J. and Michalik, D.}},
  issn         = {{0004-6361}},
  keywords     = {{Asteroids: general; Astrometry; Catalogs; Minor planets; Stars: fundamental parameters; Stars: variables: general; Techniques: radial velocities}},
  language     = {{eng}},
  month        = {{01}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{Summary of the contents and survey properties}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201833051}},
  doi          = {{10.1051/0004-6361/201833051}},
  volume       = {{616}},
  year         = {{2018}},
}

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Summary of the contents and survey properties