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Variable Stars in the Old Open Cluster Berkeley 39

Mazur B., Krzemiński W., Kaluzny J.

Acta Astronomica

1999

Vol. 49, No. 4

551--560

We present the results of a CCD photometric survey of the old open cluster Berkeley 39. We discovered 5 new variables, one of which is a W UMa-type system, one is probable δ Scuti pulsating blue straggler, and three are stars for which the eclipse-like events were observed - most likely they are detached binaries. V-band light curves of the previously identified binaries, as well as the improved periods and colors at maximum are given.