Gaia Data Release 2 - Photometric content and validation

Aims. We describe the photometric content of the second data release of the Gaia project (Gaia DR2) and its validation along with the quality of the data. Methods. The validation was mainly carried out using an internal analysis of the photometry. External comparisons were also made, but were limite...

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Autores: Gaia Collaboration, Riello, Marco, Angeli, Francesca de, Carrasco Martínez, José Manuel, Montegriffo, Paolo, Fabricius, Claus, Jordi i Nebot, Carme, Portell i de Mora, Jordi, Balaguer Núñez, María de los Dolores, Busso, Giorgia, Cacciari, Carla, Leeuwen, Floor van, Burgess, Patrick W., Davidson, Michael, Evans, Dafydd Wyn
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/140651
Acceso en línea:https://hdl.handle.net/2445/140651
Access Level:acceso abierto
Palabra clave:Astrometria
Galàxies
Catàlegs d'estels
Instruments astronòmics
Astrometry
Galaxies
Star catalogs
Astronomical instruments
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spelling Gaia Data Release 2 - Photometric content and validationGaia CollaborationRiello, MarcoAngeli, Francesca deCarrasco Martínez, José ManuelMontegriffo, PaoloFabricius, ClausJordi i Nebot, CarmePortell i de Mora, JordiBalaguer Núñez, María de los DoloresBusso, GiorgiaCacciari, CarlaLeeuwen, Floor vanBurgess, Patrick W.Davidson, MichaelEvans, Dafydd WynAstrometriaGalàxiesCatàlegs d'estelsInstruments astronòmicsAstrometryGalaxiesStar catalogsAstronomical instrumentsAims. We describe the photometric content of the second data release of the Gaia project (Gaia DR2) and its validation along with the quality of the data. Methods. The validation was mainly carried out using an internal analysis of the photometry. External comparisons were also made, but were limited by the precision and systematics that may be present in the external catalogues used. Results. In addition to the photometric quality assessment, we present the best estimates of the three photometric passbands. Various colour-colour transformations are also derived to enable the users to convert between the Gaia and commonly used passbands. Conclusions. The internal analysis of the data shows that the photometric calibrations can reach a precision as low as 2 mmag on individual CCD measurements. Other tests show that systematic effects are present in the data at the 10 mmag level.EDP Sciences2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/140651Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/201832756Astronomy & Astrophysics, 2018, vol. 616, num. A4https://doi.org/10.1051/0004-6361/201832756(c) The European Southern Observatory (ESO), 2018info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1406512026-05-27T06:46:51Z
dc.title.none.fl_str_mv Gaia Data Release 2 - Photometric content and validation
title Gaia Data Release 2 - Photometric content and validation
spellingShingle Gaia Data Release 2 - Photometric content and validation
Gaia Collaboration
Astrometria
Galàxies
Catàlegs d'estels
Instruments astronòmics
Astrometry
Galaxies
Star catalogs
Astronomical instruments
title_short Gaia Data Release 2 - Photometric content and validation
title_full Gaia Data Release 2 - Photometric content and validation
title_fullStr Gaia Data Release 2 - Photometric content and validation
title_full_unstemmed Gaia Data Release 2 - Photometric content and validation
title_sort Gaia Data Release 2 - Photometric content and validation
dc.creator.none.fl_str_mv Gaia Collaboration
Riello, Marco
Angeli, Francesca de
Carrasco Martínez, José Manuel
Montegriffo, Paolo
Fabricius, Claus
Jordi i Nebot, Carme
Portell i de Mora, Jordi
Balaguer Núñez, María de los Dolores
Busso, Giorgia
Cacciari, Carla
Leeuwen, Floor van
Burgess, Patrick W.
Davidson, Michael
Evans, Dafydd Wyn
author Gaia Collaboration
author_facet Gaia Collaboration
Riello, Marco
Angeli, Francesca de
Carrasco Martínez, José Manuel
Montegriffo, Paolo
Fabricius, Claus
Jordi i Nebot, Carme
Portell i de Mora, Jordi
Balaguer Núñez, María de los Dolores
Busso, Giorgia
Cacciari, Carla
Leeuwen, Floor van
Burgess, Patrick W.
Davidson, Michael
Evans, Dafydd Wyn
author_role author
author2 Riello, Marco
Angeli, Francesca de
Carrasco Martínez, José Manuel
Montegriffo, Paolo
Fabricius, Claus
Jordi i Nebot, Carme
Portell i de Mora, Jordi
Balaguer Núñez, María de los Dolores
Busso, Giorgia
Cacciari, Carla
Leeuwen, Floor van
Burgess, Patrick W.
Davidson, Michael
Evans, Dafydd Wyn
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Astrometria
Galàxies
Catàlegs d'estels
Instruments astronòmics
Astrometry
Galaxies
Star catalogs
Astronomical instruments
topic Astrometria
Galàxies
Catàlegs d'estels
Instruments astronòmics
Astrometry
Galaxies
Star catalogs
Astronomical instruments
description Aims. We describe the photometric content of the second data release of the Gaia project (Gaia DR2) and its validation along with the quality of the data. Methods. The validation was mainly carried out using an internal analysis of the photometry. External comparisons were also made, but were limited by the precision and systematics that may be present in the external catalogues used. Results. In addition to the photometric quality assessment, we present the best estimates of the three photometric passbands. Various colour-colour transformations are also derived to enable the users to convert between the Gaia and commonly used passbands. Conclusions. The internal analysis of the data shows that the photometric calibrations can reach a precision as low as 2 mmag on individual CCD measurements. Other tests show that systematic effects are present in the data at the 10 mmag level.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/140651
url https://hdl.handle.net/2445/140651
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/201832756
Astronomy & Astrophysics, 2018, vol. 616, num. A4
https://doi.org/10.1051/0004-6361/201832756
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2018
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2018
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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