ИСТИНА

Our photometric monitoring of CH Cyg revealed a gradual increase of its brightness in U from 2010. More recent observations, made during 2014 – 2015 suggest that CH Cyg entered a new active phase. Monitoring for rapid variability demonstrated anunambiguous connection between appearance of pronounced rapid variations and the level of the overall brightness in U, i.e. the activity of CH Cyg. Rapid light variations show a short-term changes on the time-scale of minutes with an amplitude of a few x 0.1 mag, often superposed on a wave lasting of a few hours and having an amplitude of more than 0.5 mag. This short-term variability is connected with accretion process onto the white dwarf.