Electrophotometric observations of the EV Lac flares in U, Hα and Hβ

Abstract

Results of the patrol observations of the EV Lac flares in U, Hα and Hβ bands are given. The observations are carried out simultaneously in U and Hα or in U and Hβ. During (U, Hα) observations 21 U -flares are registered of which only comparatively strong one is accompanied by a real Hα - flare. And during (U, Hβ) observations among 7 U-flares the strongest and a “slow” one is accompanied with an increase of Hβ -signal. Small amplitude periodic light variations of EV Lac are detected with a period of 3d. 3 and amplitude 0m.02 in B and V bands.