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Erratum: Gaia Early Data Release 3: Summary of the contents and survey properties (Astronomy and Astrophysics DOI: 10.1051/0004-6361/202039657)

Published version
Peer-reviewed

Type

Article

Change log

Authors

Brown, AGA 
Vallenari, A 
Prusti, T 
De Bruijne, JHJ 
Babusiaux, C 

Abstract

We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of radial velocities from Gaia DR2. Gaia EDR3 contains celestial positions and the apparent brightness in G for approximately 1.8 billion sources. For 1.5 billion of those sources, parallaxes, proper motions, and the (G_BP-G_RP) colour are also available. The passbands for G, G_BP, and G_RP are provided as part of the release. For ease of use, the 7 million radial velocities from Gaia DR2 are included in this release, after the removal of a small number of spurious values. New radial velocities will appear as part of Gaia DR3. Finally, Gaia EDR3 represents an updated materialisation of the celestial reference frame (CRF) in the optical, the Gaia-CRF3, which is based solely on extragalactic sources. The creation of the source list for Gaia EDR3 includes enhancements that make it more robust with respect to high proper motion stars, and the disturbing effects of spurious and partially resolved sources. The source list is largely the same as that for Gaia DR2, but it does feature new sources and there are some notable changes. The source list will not change for Gaia DR3. Gaia EDR3 represents a significant advance over Gaia DR2, with parallax precisions increased by 30 percent, proper motion precisions increased by a factor of 2, and the systematic errors in the astrometry suppressed by 30--40 percent for the parallaxes and by a factor ~2.5 for the proper motions. The photometry also features increased precision, but above all much better homogeneity across colour, magnitude, and celestial position. A single passband for G, G_BP, and G_RP is valid over the entire magnitude and colour range, with no systematics above the 1 percent level.

Description

Keywords

catalogs, astrometry, parallaxes, proper motions, techniques: photometric, errata, addenda

Journal Title

Astronomy and Astrophysics

Conference Name

Journal ISSN

0004-6361
1432-0746

Volume Title

650

Publisher

EDP Sciences

Rights

All rights reserved
Sponsorship
STFC (ST/K000756/1)
STFC (ST/N000641/1)
Science and Technology Facilities Council (ST/S002103/1)
STFC (ST/S000089/1)
STFC (via University of Edinburgh) (WT 5199883)
European Commission (264895)
European Research Council (320360)
European Commission (606740)