Cl* NGC 2539 CKY V3 and V4 BV light curves

CCD photometric observations of the eclipsing contact binaries (EW type) V3 and V4 of the cluster NGC 2539 were made in the B and V bands using the 2m telescope at the...本研究采用位于[观测地点信息未完整给出]的2米望远镜，在B、V两个波段下，对NGC 2539星团中的食接双星（EW型）成员V3与V4开展了CCD测光观测。