BV photometric observations of the flickering of the dwarf nova RX And

Abstract

We report photometry of the intranight variability of the dwarf nova RX~And in two bands ($B$ and $V$). The observations are carried out during three nights in November-December 2022 with the 50/70~cm Schmidt telescope of the Rozhen National Astronomical Observatory. The observations indicate that the amplitude of the flickering is about 0.5 mag in $B$ band when the star is in faint state ($m_V \approx 13.5$), but it is considerably lower (less than 0.1 mag) when the star is bright ($m_V \approx 10.9$). The mass accretion rate in high state is estimated to be $1.2 \times 10^{-9}$~M$_\odot$~yr$^{-1}$. Combining our data and GAIA distances we find for the mass donor in RX~And spectral type K6V-K7V.

The data are available upon request from the authors.