Gaia Early Data Release 3: Summary of the contents and survey properties

Context. We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of radial velocities from Gaia DR2. Aims. A summary of the contents of Gaia EDR3 is presented, a...

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Autores: Brown, Anthony G.A., Vallenari, Antonella, Prusti, Timo, De Bruijne, Jos H.J., Babusiaux, Carine, Biermann, Michael, Creevey, Orlagh L., Evans, Dafydd Wyn, Eyer, Laurent, Hutton, A., Jansen, F., Jordi, C., Klioner, Sergei A., Lammers, Uwe, Lindegren, L., Luri, X., Mignard, François, Panem, C., Pourbaix, D., Carballo Fidalgo, Ruth
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/23739
Acceso en línea:http://hdl.handle.net/10902/23739
Access Level:acceso abierto
Palabra clave:Catalogs
Astrometry
Parallaxes
Proper motions
Techniques: photometric
Techniques: radial velocities
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repository_id_str
dc.title.none.fl_str_mv Gaia Early Data Release 3: Summary of the contents and survey properties
title Gaia Early Data Release 3: Summary of the contents and survey properties
spellingShingle Gaia Early Data Release 3: Summary of the contents and survey properties
Brown, Anthony G.A.
Catalogs
Astrometry
Parallaxes
Proper motions
Techniques: photometric
Techniques: radial velocities
title_short Gaia Early Data Release 3: Summary of the contents and survey properties
title_full Gaia Early Data Release 3: Summary of the contents and survey properties
title_fullStr Gaia Early Data Release 3: Summary of the contents and survey properties
title_full_unstemmed Gaia Early Data Release 3: Summary of the contents and survey properties
title_sort Gaia Early Data Release 3: Summary of the contents and survey properties
dc.creator.none.fl_str_mv Brown, Anthony G.A.
Vallenari, Antonella
Prusti, Timo
De Bruijne, Jos H.J.
Babusiaux, Carine
Biermann, Michael
Creevey, Orlagh L.
Evans, Dafydd Wyn
Eyer, Laurent
Hutton, A.
Jansen, F.
Jordi, C.
Klioner, Sergei A.
Lammers, Uwe
Lindegren, L.
Luri, X.
Mignard, François
Panem, C.
Pourbaix, D.
Carballo Fidalgo, Ruth
author Brown, Anthony G.A.
author_facet Brown, Anthony G.A.
Vallenari, Antonella
Prusti, Timo
De Bruijne, Jos H.J.
Babusiaux, Carine
Biermann, Michael
Creevey, Orlagh L.
Evans, Dafydd Wyn
Eyer, Laurent
Hutton, A.
Jansen, F.
Jordi, C.
Klioner, Sergei A.
Lammers, Uwe
Lindegren, L.
Luri, X.
Mignard, François
Panem, C.
Pourbaix, D.
Carballo Fidalgo, Ruth
author_role author
author2 Vallenari, Antonella
Prusti, Timo
De Bruijne, Jos H.J.
Babusiaux, Carine
Biermann, Michael
Creevey, Orlagh L.
Evans, Dafydd Wyn
Eyer, Laurent
Hutton, A.
Jansen, F.
Jordi, C.
Klioner, Sergei A.
Lammers, Uwe
Lindegren, L.
Luri, X.
Mignard, François
Panem, C.
Pourbaix, D.
Carballo Fidalgo, Ruth
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Catalogs
Astrometry
Parallaxes
Proper motions
Techniques: photometric
Techniques: radial velocities
topic Catalogs
Astrometry
Parallaxes
Proper motions
Techniques: photometric
Techniques: radial velocities
description Context. We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of radial velocities from Gaia DR2. Aims. A summary of the contents of Gaia EDR3 is presented, accompanied by a discussion on the differences with respect to Gaia DR2 and an overview of the main limitations which are present in the survey. Recommendations are made on the responsible use of Gaia EDR3 results. Methods. The raw data collected with the Gaia instruments during the first 34 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium and turned into this early third data release, which represents a major advance with respect to Gaia DR2 in terms of astrometric and photometric precision, accuracy, and homogeneity. Results. Gaia EDR3 contains celestial positions and the apparent brightness in G for approximately 1.8 billion sources. For 1.5 billion of those sources, parallaxes, proper motions, and the (GBP ? GRP) colour are also available. The passbands for G, GBP, and GRP are provided as part of the release. For ease of use, the 7 million radial velocities from Gaia DR2 are included in this release, after the removal of a small number of spurious values. New radial velocities will appear as part of Gaia DR3. Finally, Gaia EDR3 represents an updated materialisation of the celestial reference frame (CRF) in the optical, the Gaia-CRF3, which is based solely on extragalactic sources. The creation of the source list for Gaia EDR3 includes enhancements that make it more robust with respect to high proper motion stars, and the disturbing effects of spurious and partially resolved sources. The source list is largely the same as that for Gaia DR2, but it does feature new sources and there are some notable changes. The source list will not change for Gaia DR3. Conclusions. Gaia EDR3 represents a significant advance over Gaia DR2, with parallax precisions increased by 30 per cent, proper motion precisions increased by a factor of 2, and the systematic errors in the astrometry suppressed by 30-40% for the parallaxes and by a factor ~2.5 for the proper motions. The photometry also features increased precision, but above all much better homogeneity across colour, magnitude, and celestial position. A single passband for G, GBP, and GRP is valid over the entire magnitude and colour range, with no systematics above the 1% level
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/23739
url http://hdl.handle.net/10902/23739
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Astronomy & Astrophysics 2021, 649, A1 - (CORRIGENDUM), 2021, 640, C3
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Gaia Early Data Release 3: Summary of the contents and survey propertiesBrown, Anthony G.A.Vallenari, AntonellaPrusti, TimoDe Bruijne, Jos H.J.Babusiaux, CarineBiermann, MichaelCreevey, Orlagh L.Evans, Dafydd WynEyer, LaurentHutton, A.Jansen, F.Jordi, C.Klioner, Sergei A.Lammers, UweLindegren, L.Luri, X.Mignard, FrançoisPanem, C.Pourbaix, D.Carballo Fidalgo, RuthCatalogsAstrometryParallaxesProper motionsTechniques: photometricTechniques: radial velocitiesContext. We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of radial velocities from Gaia DR2. Aims. A summary of the contents of Gaia EDR3 is presented, accompanied by a discussion on the differences with respect to Gaia DR2 and an overview of the main limitations which are present in the survey. Recommendations are made on the responsible use of Gaia EDR3 results. Methods. The raw data collected with the Gaia instruments during the first 34 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium and turned into this early third data release, which represents a major advance with respect to Gaia DR2 in terms of astrometric and photometric precision, accuracy, and homogeneity. Results. Gaia EDR3 contains celestial positions and the apparent brightness in G for approximately 1.8 billion sources. For 1.5 billion of those sources, parallaxes, proper motions, and the (GBP ? GRP) colour are also available. The passbands for G, GBP, and GRP are provided as part of the release. For ease of use, the 7 million radial velocities from Gaia DR2 are included in this release, after the removal of a small number of spurious values. New radial velocities will appear as part of Gaia DR3. Finally, Gaia EDR3 represents an updated materialisation of the celestial reference frame (CRF) in the optical, the Gaia-CRF3, which is based solely on extragalactic sources. The creation of the source list for Gaia EDR3 includes enhancements that make it more robust with respect to high proper motion stars, and the disturbing effects of spurious and partially resolved sources. The source list is largely the same as that for Gaia DR2, but it does feature new sources and there are some notable changes. The source list will not change for Gaia DR3. Conclusions. Gaia EDR3 represents a significant advance over Gaia DR2, with parallax precisions increased by 30 per cent, proper motion precisions increased by a factor of 2, and the systematic errors in the astrometry suppressed by 30-40% for the parallaxes and by a factor ~2.5 for the proper motions. The photometry also features increased precision, but above all much better homogeneity across colour, magnitude, and celestial position. A single passband for G, GBP, and GRP is valid over the entire magnitude and colour range, with no systematics above the 1% levelThe Gaia mission and data processing have financially been supported by ; the Spanish Ministry of Economy (MINECO/FEDER, UE) through grants ESP2016-80079-C2-1-R, ESP2016-80079-C2-2-R, RTI2018-095076-B-C21, RTI2018-095076-B-C22, BES-2016-078499, and BES-2017-083126 and the Juan de la Cierva formación 2015 grant FJCI-2015-2671, the Spanish Ministry of Education, Culture, and Sports through grant FPU16/03827, the Spanish Ministry of Science and Innovation (MICINN) through grant AYA2017-89841P for project “Estudio de las propiedades de los fósiles estelares en el entorno del Grupo Local” and through grant TIN2015-65316-P for project “Computación de Altas Prestaciones VII.EDP SciencesUniversidad de Cantabria20212021-01-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/23739Astronomy & Astrophysics 2021, 649, A1 - (CORRIGENDUM), 2021, 640, C3reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/237392026-06-02T12:39:31Z
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