Discovery of eRASSt J192932.9–560346: A bright, two-pole accreting, eclipsing polar

We report the discovery of a bright (V ~ 15), eclipsing, two-pole accreting magnetic cataclysmic variable (CV), polar, as counterpart eROSITA and Gaia transients eRASSt 192932.9-560346 Gaia21bxo. Frequent large amplitude changes its brightness at X-ray optical wavelengths by more than 4 magnitudes was indicative CV nature source. Identification spectra obtained with 10m SALT telescope revealed typical features CV, strong, broad HeI, HeII hydrogen Balmer emission lines superposed on blue continuum. Time-resolved photoelectric polarimetry circular polarization to vary from -20% +20%, linear 0% 10% confirming system be polar subclass. High cadence photometry deep, structured eclipses, indicating that is two pole accretor. The orbital period determined eclipse times 92.5094 +- 0.0002 min. spectrum thermal only implied luminosity L_X=2.2 x 10^(31) erg/s Gaia-determined distance 376 pc.