12 M92 variables Photographic observations

The periods and the light curves of 12 variable stars of the globular cluster M92 have been studied analyzing 176 plates obtained with the 60 cm reflector of Bologna Observatory...本研究通过分析由博洛尼亚天文台60厘米反射望远镜拍摄的176张照相底片，对球状星团（globular cluster）M92的12颗变星（variable star）的周期与光变曲线（light curves）展开了研究……