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SUMMARY:The search for variable AGN with Gaia
DTSTART;VALUE=DATE-TIME:20230628T084500Z
DTEND;VALUE=DATE-TIME:20230628T090000Z
DTSTAMP;VALUE=DATE-TIME:20261017T052058Z
UID:indico-contribution-810@cern.ch
DESCRIPTION:Speakers: Maria Isabel Carnerero Martin (INAF-Osservatorio Ast
 rofisico di Torino)\nThe third release of Gaia data\, published on June 13
 \, 2022\, includes not only astrometric and astrophysical parameters of di
 fferent types of sources\, but also several catalogues of variable sources
 . Among these\, the catalogue of Gaia variable AGN\, which is described by
  Carnerero et al. (2022). To identify the variable AGN\, we analyzed the l
 ight curves of more than 80 million sources observed by Gaia\, selecting 8
 70 thousands of them compliant with requirements on their variability prop
 erties (structure function\, Butler and Bloom metrics\, fractional variabi
 lity)\, color indices\, astrometric parameters and others. The purpose was
  to create a variable AGN catalogue as pure as possible. More than 21\,000
  of these 870 thousand sources are identified as variable AGN for the firs
 t time. For each source of the catalogue\, the Gaia multi-band light curve
 s and the values of a number of variability parameters have been included 
 in the database. In view of the next Gaia DR4\, we are now implementing ne
 w variability parameters that will be published in the Gaia AGN variabilit
 y table. They will be useful to the community\, both for carrying out stat
 istical studies  and for AGN classification with machine learning.\n\nhttp
 s://indico.unina.it/event/61/contributions/810/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/810/
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