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...
| Autores: | ; ; ; ; ; ; ; ; ; ; ; ; ; ; |
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| Tipo de documento: | Artículo |
| Estado: | Published version |
| 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 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Astrometria Galàxies Catàlegs d'estels Instruments astronòmics Astrometry Galaxies Star catalogs Astronomical instruments |
| _version_ | 1878734445633077248 |
|---|---|
| author | Gaia Collaboration |
| 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 |
| author_browse | Angeli, Francesca de Balaguer Núñez, María de los Dolores Burgess, Patrick W. Busso, Giorgia Cacciari, Carla Carrasco Martínez, José Manuel Davidson, Michael Evans, Dafydd Wyn Fabricius, Claus Gaia Collaboration Jordi i Nebot, Carme Leeuwen, Floor van Montegriffo, Paolo Portell i de Mora, Jordi Riello, Marco |
| 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 |
| collection | Dipòsit Digital de la UB |
| 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_6a241e3fdeca4bb5d3121ef7dfb0f9e2 |
| institution | Universidad de Barcelona |
| instname_str | Universidad de Barcelona |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:diposit.ub.edu:2445/140651 |
| publishDate | 2018 |
| publishDateSort | 2018 |
| publisher | EDP Sciences |
| publisherStr | EDP Sciences |
| reponame_str | Dipòsit Digital de la UB |
| spelling | Gaia Data Release 2 - Photometric content and validation 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 Astrometria Galàxies Catàlegs d'estels Instruments astronòmics Astrometry Galaxies Star catalogs Astronomical instruments 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. EDP Sciences https://hdl.handle.net/2445/140651 |
| spellingShingle | Gaia Data Release 2 - Photometric content and validation Gaia Collaboration Astrometria Galàxies Catàlegs d'estels Instruments astronòmics Astrometry Galaxies Star catalogs Astronomical instruments |
| status_str | publishedVersion |
| title | 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_short | Gaia Data Release 2 - Photometric content and validation |
| title_sort | Gaia Data Release 2 - Photometric content and validation |
| topic | Astrometria Galàxies Catàlegs d'estels Instruments astronòmics Astrometry Galaxies Star catalogs Astronomical instruments |
| topic_facet | Astrometria Galàxies Catàlegs d'estels Instruments astronòmics Astrometry Galaxies Star catalogs Astronomical instruments |
| url | https://hdl.handle.net/2445/140651 |