Variability survey in NGC 6910, the open cluster rich in $\beta$ Cephei-type stars

D. Moździerski, A. Pigulski, Z. Kołaczkowski +14

NGC 6910 is the northern hemisphere open cluster known to be rich in $\beta$ Cephei-type stars. Using four-season photometry obtained in Białków (Poland) and Xinglong (China) observato…