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gaia data release 3 documentation

10.5 Cepheids

10.5.5 Quality assessment and validation

Quality assessment and validation of the results have been carried out by cross-matching the results with catalogues of known Cepheid stars from other surveys (OGLE IV, ZTF, ASAS, ASAS-SN, Catalina, LINEAR, catalogues of variable stars in globular clusters and dwarf spheroidal galaxies). A total of about 7500, 10270, 2300, and 700 Cepheids of all types have been collected from the literature in the Milky Way, the Magellanic Clouds, M31, and M33, respectively.


Verification is done by cross-matching our results with catalogues of known Cepheid stars and comparing source attributes, such as the period(s) of pulsation and the classification, computed by SOS Cep&RRL pipeline with those published in the literature.


Taking advantage of the comparison between properties of Cepheid variable candidates derived by the SOS pipeline and those of known objects in the literature, we made a selection of the candidates that led to the final published catalogue. Details on completeness and contamination estimates can be found in Ripepi et al. (2023).