The Gaia mission discovered several hundred thousand long-period variables and measured parallaxes for many of them. These stars will allow to study populations of variable stars in the Milky Way, among others Asymptotic Giant Branch stars. This paper describes the identification of Gaia counterparts of a sample of oxygen-rich AGB stars with OH maser emission, as a first step towards the compilation of a general Gaia Catalogue of Galactic AGB Stars. With such a catalogue, tests of evolutionary models for the AGB star population in the solar neighbourhood become feasible. We cross-matched AGB star candidates showing OH maser emission with the Gaia DR3 release, using a cross-match with AllWISE and 2MASS as intermediate steps to avoid ambiguities. With the help of the Virtual Observatory, we retrieved photometric data from the near-ultraviolet to the far-infrared and built spectral energy distributions (SED) of the sources. The SEDs were fitted with theoretical models. The fit results, together with information from the literature, allowed us to clean the sample from non-AGB stars. For the AGB stars, bolometric fluxes were obtained. Distances based on Gaia parallaxes were used to derive stellar luminosities. We identified unique Gaia counterparts for 1487 OH masers. Of them, 1172 had an unambiguous classification as AGB stars, making up the Gaia OH/IR star sample. Parallaxes with relative errors <20% and astrometric excess noise 4mag) and larger amplitudes (>1mag in the G-band), which are typical for periodic large-amplitude Mira variables.

Cone search capability for table J/A+A/698/A109/table2 (OH/IR sample)

Cone search capability for table J/A+A/698/A109/table3 (Excluded sample)