Gaia Early Data Release 3 - Catalogue validation

Context. The third Gaia data release is published in two stages. The early part, Gaia EDR3, gives very precise astrometric and photometric properties for nearly two billion sources together with seven million radial velocities from Gaia DR2. The full release, Gaia DR3, will add radial velocities, sp...

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Detalhes bibliográficos
Autores: Fabricius, Claus, Luri Carrascoso, Xavier, Arenou, F., Babusiaux, C., Helmi, A., Muraveva, Tatiana, Reylé, C., Spoto, F., Vallenari, A., Antoja, T. (Teresa), Balbinot, E., Barache, C., Bauchet, N., Bragaglia, A., Busonero, D., Cantat Gaudin, Tristan, Carrasco Martínez, José Manuel, Diakité, S., Fabrizio, M., Figueras Siñol, Francesca, Garcia-Gutierrez, A., Garofalo, A., Jordi i Nebot, Carme, Kervella, P., Khanna, S., Leclerc, N., Licata, E., Lambert, S., Marrese, P. M., Masip Vela, Albert, Ramos, P., Robichon, N., Robin, A. C., Romero Gómez, Mercè, Rubele, S., Weiler, Michael
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/218456
Acesso em linha:https://hdl.handle.net/2445/218456
Access Level:acceso abierto
Palavra-chave:Fotometria
Galàxies
Astrometria
Photometry
Galaxies
Astrometry
Descrição
Resumo:Context. The third Gaia data release is published in two stages. The early part, Gaia EDR3, gives very precise astrometric and photometric properties for nearly two billion sources together with seven million radial velocities from Gaia DR2. The full release, Gaia DR3, will add radial velocities, spectra, light curves, and astrophysical parameters for a large subset of the sources, as well as orbits for solar system objects. Aims. Before the publication of the catalogue, many different data items have undergone dedicated validation processes. The goal of this paper is to describe the validation results in terms of completeness, accuracy, and precision for the Gaia EDR3 data and to provide recommendations for the use of the catalogue data. Methods. The validation processes include a systematic analysis of the catalogue contents to detect anomalies, either individual errors or statistical properties, using statistical analysis and comparisons to the previous release as well as to external data and to models. Results. Gaia EDR3 represents a major step forward, compared to Gaia DR2, in terms of precision, accuracy, and completeness for both astrometry and photometry. We provide recommendations for dealing with issues related to the parallax zero point, negative parallaxes, photometry for faint sources, and the quality indicators.

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