Gaia Early Data Release 3: Photometric content and validation
Riello, M., et al.
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
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| Acceso en línea: | http://hdl.handle.net/10261/256736 |
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| Palabra clave: | Catalogs Surveys Instrumentation: photometers Techniques: photometric Galaxy: general |
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Gaia Early Data Release 3: Photometric content and validation |
| title |
Gaia Early Data Release 3: Photometric content and validation |
| spellingShingle |
Gaia Early Data Release 3: Photometric content and validation Riello, Marco Catalogs Surveys Instrumentation: photometers Techniques: photometric Galaxy: general |
| title_short |
Gaia Early Data Release 3: Photometric content and validation |
| title_full |
Gaia Early Data Release 3: Photometric content and validation |
| title_fullStr |
Gaia Early Data Release 3: Photometric content and validation |
| title_full_unstemmed |
Gaia Early Data Release 3: Photometric content and validation |
| title_sort |
Gaia Early Data Release 3: Photometric content and validation |
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Riello, Marco Carrasco, J. M. Fabricius, Claus Weiler, Michael |
| author |
Riello, Marco |
| author_facet |
Riello, Marco Carrasco, J. M. Fabricius, Claus Weiler, Michael |
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author |
| author2 |
Carrasco, J. M. Fabricius, Claus Weiler, Michael |
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author author author |
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Croatian Science Foundation Agenzia Spaziale Italiana Istituto Nazionale di Astrofisica Ministerio de Ciencia, Innovación y Universidades (España) Particle Physics and Astronomy Research Council (UK) University of Bristol UK Space Agency University of Cambridge University of Edinburgh University of Leicester University College London Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
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Catalogs Surveys Instrumentation: photometers Techniques: photometric Galaxy: general |
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Catalogs Surveys Instrumentation: photometers Techniques: photometric Galaxy: general |
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Riello, M., et al. |
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2021 |
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2021 2021 2021 2021 |
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Gaia Early Data Release 3: Photometric content and validationRiello, MarcoCarrasco, J. M.Fabricius, ClausWeiler, MichaelCatalogsSurveysInstrumentation: photometersTechniques: photometricGalaxy: generalRiello, M., et al.[Context] Gaia Early Data Release 3 (Gaia EDR3) contains astrometry and photometry results for about 1.8 billion sources based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational phase. [Aims] In this paper, we focus on the photometric content, describing the input data, the algorithms, the processing, and the validation of the results. Particular attention is given to the quality of the data and to a number of features that users may need to take into account to make the best use of the Gaia EDR3 catalogue. [Methods] The processing broadly followed the same procedure as for Gaia DR2, but with significant improvements in several aspects of the blue and red photometer (BP and RP) preprocessing and in the photometric calibration process. In particular, the treatment of the BP and RP background has been updated to include a better estimation of the local background, and the detection of crowding effects has been used to exclude affected data from the calibrations. The photometric calibration models have also been updated to account for flux loss over the whole magnitude range. Significant improvements in the modelling and calibration of the Gaia point and line spread functions have also helped to reduce a number of instrumental effects that were still present in DR2. Results. Gaia EDR3 contains 1.806 billion sources with G-band photometry and 1.540 billion sources with GBP and GRP photometry. The median uncertainty in the G-band photometry, as measured from the standard deviation of the internally calibrated mean photometry for a given source, is 0.2 mmag at magnitude G = 10-14, 0.8 mmag at G ≈ 17, and 2.6 mmag at G ≈ 19. The significant magnitude term found in the Gaia DR2 photometry is no longer visible, and overall there are no trends larger than 1 mmag mag-1. Using one passband over the whole colour and magnitude range leaves no systematics above the 1% level in magnitude in any of the bands, and a larger systematic is present for a very small sample of bright and blue sources. A detailed description of the residual systematic effects is provided. Overall the quality of the calibrated mean photometry in Gaia EDR3 is superior with respect to DR2 for all bands.The Gaia photometric data processing has been financially supported by (in alphabetical order by country): the Tenure Track Pilot Programme of the Croatian Science Foundation and the Ecole Polytechnique Fédérale de Lausanne and the Project TTP-2018-07-1171 Mining the Variable Sky, with funds of the Croatian-Swiss Research Programme; the Agenzia Spaziale Italiana (ASI) through contracts I/037/08/0, I/058/10/0, 2014-025-R.0, 2014-025-R.1.2015 and 2018-24-HH.0 to the Italian Istituto Nazionale di Astrofisica (INAF), and INAF; the Spanish Ministry of Science, Innovation and University (MICIU/FEDER, UE) through grants RTI2018-095076-B-C21, ESP2016-80079-C2-1-R, and the Institute of Cosmos Sciences University of Barcelona (ICCUB, Unidad de Excelencia “María de Maeztu”) through grants MDM-2014-0369 and CEX2019-000918-M; the United Kingdom Particle Physics and Astronomy Research Council (PPARC), the United Kingdom Science and Technology Facilities Council (STFC), and the United Kingdom Space Agency (UKSA) through the following grants to the University of Bristol, the University of Cambridge, the University of Edinburgh, the University of Leicester, the Mullard Space Sciences Laboratory of University College London, and the United Kingdom Rutherford Appleton Laboratory (RAL): PP/D006511/1, PP/D006546/1, PP/D006570/1, ST/I000852/1, ST/J005045/1, ST/K00056X/1, ST/K000209/1, ST/K000756/1, ST/L006561/1, ST/N000595/1, ST/N000641/1, ST/N000978/1, ST/N001117/1, ST/S000089/1, ST/S000976/1, ST/S001123/1, ST/S001948/1, ST/S002103/1, and ST/V000969/1.EDP SciencesCroatian Science FoundationAgenzia Spaziale ItalianaIstituto Nazionale di AstrofisicaMinisterio de Ciencia, Innovación y Universidades (España)Particle Physics and Astronomy Research Council (UK)University of BristolUK Space AgencyUniversity of CambridgeUniversity of EdinburghUniversity of LeicesterUniversity College LondonConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/256736reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-095076-B-C21info:eu-repo/grantAgreement/MINECO//MDM-2014-0369http://doi.org/10.1051/0004-6361/202039587Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2567362026-05-22T06:33:51Z |
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