The Gothard Observatory Synthetic Stellar Photometry Database

Context . To determine stellar luminosities and radii, it is necessary to know the total bolometric fluxes emitted by stars - or equivalently their bolometric corrections (BCs) - as accurately as possible. Aims . The aim of this paper is to present and describe a new database of synthetic stellar magnitudes and BCs for 752 filters from 78 ground- and space-based instruments calculated using the most recent version of the BOSZ synthetic stellar spectral library. Methods . From the entire grid of BOSZ theoretical spectra, our synthetic magnitudes in the Vega magnitude system were determined using the corresponding species Python routines. Results . The database spans effective temperatures from 2800 to 16 000 K, log g from −0.5 to 5.5, metallicities from −2.5 to 0.75, [α/M] from −0.25 to 0.5, [C/M] from −0.75 to 0.5, and reddening up to A V = 3.1 mag. Using high-resolution (R = 50 000) synthetic spectra allowed us to precisely track the effects of abundances on stellar BCs and luminosities. Conclusions . By applying the new BCs to 192 000 APOGEE stars, we calculated luminosities and demonstrated that neglecting carbon can introduce up to ±0.2% errors in luminosity. The new Gothard Observatory Synthetic Stellar Photometry Database may enable more accurate fundamental parameter determinations for large stellar samples using a vast amount of past, present, and upcoming surveys, such as Gaia, LSST, and the Roman Space Telescope.