10.12.5 Quality assessment and validation
A time series cleaning operator dedicated to per-CCD photometry has been applied (see Section 10.2.3), specific to the short-timescale analysis and based on the expected amplitude of the variation in the band. Consistency of the -band photometry with the BP and RP photometry was ensured by limiting the discrepancy between fluxes in the versus and bands. Visual inspection of candidate light curves enabled us to further refine the selection criteria and clean suspicious short-timescale samples.
Given the sensitivity of short-timescale methods to changes in magnitude per unit time, variations typical of short-period objects (such as EW-type eclipsing binaries and Scuti stars) and/or sources with rapid changes in magnitude (such as the eclipses of EA-type binaries, the brightening of RR Lyrae stars of type RRab, and even low-amplitude outbursts) are naturally detected as short-timescale candidates.
About 40 % of the short-timescale candidates are found in the cross-match of Gaia DR3 sources with a compilation of variable stars from the literature (Gavras et al. 2023), among which about 80 % are classified as eclipsing binaries, 10 % as RR Lyrae stars, 6 % as solar-like variables (rotational modulation, BY Draconis, and RS Canum Venaticorum stars), and 4 % as Scuti stars.