| Issue |
A&A
Volume 674, June 2023
Gaia Data Release 3
|
|
|---|---|---|
| Article Number | A23 | |
| Number of page(s) | 20 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202243756 | |
| Published online | 16 June 2023 | |
Gaia Data Release 3
Microlensing events from all over the sky⋆
1
Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
e-mail: lw@astrouw.edu.pl
2
Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel
3
Department of Astronomy, University of Geneva, Chemin Pegasi 51, 1290 Versoix, Switzerland
4
Department of Astronomy, University of Geneva, Chemin d’Ecogia 16, 1290 Versoix, Switzerland
5
Sednai Sàrl, Geneva, Switzerland
6
European Space Astronomy Centre (ESA/ESAC), Villanueva de la Canada, 28692 Madrid, Spain
7
RHEA for European Space Agency (ESA), Camino bajo del Castillo, s/n, Urbanizacion Villafranca del Castillo, Villanueva de la Cañada, 28692 Madrid, Spain
8
Institute of Astronomy, University of Cambridge, Madingley Road, CB3 0HA Cambridge, UK
Received:
11
April
2022
Accepted:
13
June
2022
Context. One of the rarest types of variability is the phenomenon of gravitational microlensing, a transient brightening of a background star due to an intervening lensing object. Microlensing is a powerful tool for studying the invisible or otherwise undetectable populations in the Milky Way, including planets and black holes.
Aims. We describe the first Gaia catalogue of candidate microlensing events, give an overview of its content, and discuss its validation.
Methods. The catalogue of Gaia microlensing events was composed by analysing the light curves of around 2 billion sources of Gaia DR3 from all over the sky covering 34 months, between 2014 and 2017.
Results. We present 363 Gaia microlensing events and discuss their properties. Of these, 90 have never been reported before and have not been discovered by other surveys. The contamination of the catalogue is assessed to 0.6%–1.7%.
Key words: catalogs / stars: general / gravitational lensing: micro
Tables D.1 and E.1 are only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A23
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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