A dataset provided by the European Space Agency

DOI https://doi.org/10.57780/esa-sfvnhs3
Name Gaia Focused Product Release: The first results of quasars' environment analysis for gravitational lenses search
Mission Gaia
Portal URL https://www.cosmos.esa.int/web/gaia/focused-product-release
Content URL Gaia data repository
Gaia Archive at ESA
Version 1.0
Date Published 10 October 2023
Description

A list of sources around quasar candidates with minimum angular separation of 0.3 arcseconds to be used for gravitational lenses search.

The publication mainly consists of:

  • A table of 4.8 million sources (named components), based on an analysis of the observations in the neighbourhood of a list of 3.8 million quasar candidates. This table provides the mean astrometry and mean onboard photometry of the sources.
  • The analysis of this table by several artificial intelligence algorithms which led to the selection of a list of 381 gravitational lens candidates that are presented in the associated Gaia Collaboration paper. The 4.8 million sources with their scores to be a lens are available at CDS.
  • A table of individual epoch observations linked to their corresponding source (component), with their celestial coordinates and onboard magnitudes.
  • A table of individual epoch observations classified as outliers and rejected by our clustering analysis, with their celestial coordinates and onboard magnitudes.

For more information, see https://www.cosmos.esa.int/web/gaia/focused-product-release
Gaia Focused Product Release papers: : https://www.cosmos.esa.int/web/gaia/fpr-papers
Gaia Focused Product Release documentation: https://gea.esac.esa.int/archive/documentation/FPR/
Publication Gaia Collaboration, Krone-Martins, A. et al. (2024), "Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars", Astronomy & Astrophysics, 685, A130; https://doi.org/10.1051/0004-6361/202347273
Temporal Coverage From 25 July 2014 (10:30 UTC) to 28 May 2017 (08:44 UTC)
Mission description Gaia is a European space mission providing astrometry, photometry, and spectroscopy of more than 1000 million stars in the Milky Way. Also data for significant samples of extragalactic and Solar system objects is made available. The Gaia Archive contains deduced positions, parallaxes, proper motions, radial velocities, and brightnesses. Complementary information on multiplicity, photometric variability, and astrophysical parameters is provided for a large fraction of sources.

Gaia Collaboration et al. (2016): "The Gaia mission", Astronomy & Astrophysics, 595, A1; https://doi.org/10.1051/0004-6361/201629272
Creator contact Gaia Helpdesk (e-mail: gaia-helpdesk@esa.int or ticketing system: https://support.cosmos.esa.int/gaia/)
Author Gaia Collaboration 2023
Contributors Gaia Data Processing and Analysis Consortium (DPAC)
Publisher and Registrant European Space Agency
Acknowledgement This work has made use of data from the European Space Agency (ESA) mission Gaia, processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Full Gaia data credits: https://www.cosmos.esa.int/web/gaia-users/credits
Citation Guidelines European Space Agency, Gaia Collaboration, Krone-Martins, A. et al. 2023, Version 1.0, European Space Agency, https://doi.org/10.57780/esa-sfvnhs3