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gaia data release 3 documentation

10.4 Active galactic nuclei

10.4.1 Introduction

The Gaia SOS AGN work package aims at selecting and characterizing variable AGNs among the Gaia variable sources. This is obtained through the analysis of a number of properties, starting from those linked to variability. In particular, the structure function (SF; Simonetti et al. 1985) and the Butler and Bloom (2011) statistics, based on a damped random walk modelling of the SF, are known to be very effective in selecting AGNs from light curves.