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Gaia Data Release 2: Catalogue validation
- Source :
- Dipòsit Digital de la UB, Universidad de Barcelona, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2018, 616, pp.A17. ⟨10.1051/0004-6361/201833234⟩, Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 616, pp.A17. ⟨10.1051/0004-6361/201833234⟩, Recercat. Dipósit de la Recerca de Catalunya, instname
- Publication Year :
- 2018
- Publisher :
- EDP Sciences, 2018.
-
Abstract
- The second Gaia data release (DR2), contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million of stellar sources and orbits for thousands of solar system objects. Before the Catalogue publication, these data have undergone dedicated validation processes. The goal of this paper is to describe the validation results in terms of completeness, accuracy and precision of the various Gaia DR2 data. The validation processes include a systematic analysis of the Catalogue content to detect anomalies, either individual errors or statistical properties, using statistical analysis, and comparisons to external data or to models. Although the astrometric, photometric and spectroscopic data are of unprecedented quality and quantity, it is shown that the data cannot be used without a dedicated attention to the limitations described here, in the Catalogue documentation and in accompanying papers. A particular emphasis is put on the caveats for the statistical use of the data in scientific exploitation.<br />Comment: Submitted to A&A
- Subjects :
- Asteroides
Astrometria
FOS: Physical sciences
Context (language use)
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
computer.software_genre
01 natural sciences
Catàlegs d'estels
Star catalogs
Documentation
0103 physical sciences
Statistical analysis
010303 astronomy & astrophysics
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Astrophysics::Galaxy Astrophysics
Physics
010308 nuclear & particles physics
Astrophysics::Instrumentation and Methods for Astrophysics
Astronomy and Astrophysics
Astrometry
Astrophysics - Astrophysics of Galaxies
Stars
Asteroids
[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Estels
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Data mining
Astrophysics::Earth and Planetary Astrophysics
Variable star
Completeness (statistics)
Astrophysics - Instrumentation and Methods for Astrophysics
computer
Data release
Subjects
Details
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Dipòsit Digital de la UB, Universidad de Barcelona, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2018, 616, pp.A17. ⟨10.1051/0004-6361/201833234⟩, Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 616, pp.A17. ⟨10.1051/0004-6361/201833234⟩, Recercat. Dipósit de la Recerca de Catalunya, instname
- Accession number :
- edsair.doi.dedup.....cbeac9ddc61b314799c445cb0241ff4a