球状星团NGC4147天区115颗恒星的绝对自行和BVRI测光  

ABSOLUTE PROPER MOTIONS AND BVRI PHOTOMETRY OF 115 STARS IN THE REGION OF THE GLOBULAR CLUSTER NGC 4147

作　　者：王家骥[1] A.C.Gupta 

机构地区：[1]中国科学院上海天文台 [2]DepartmentofPhysics,UniversityofGorakhpur,Gorakhpur273009,India

出　　处：《中国科学院上海天文台年刊》1998年第19期28-34,共7页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

基　　金：国家攀登计划;国家自然科学基金;中国科学院天文委员会支持项目

摘　　要：以上海天文台佘山40cm折射望远镜于1958年拍摄的3张照相底片为第一期资料，印度Kavalur的2．34mVainuBappu望远镜于1996年用CCD拍摄的4幅图象为第二期资料，使用Brosche等人1985年发表的球状星团NGC4147天区42颗恒星的位置和绝对自行作为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近11'×11'天区内到B=17．6mag为止115颗恒星的位置和绝对自行，并利用这些自行对成员概率作了估计。同时，还用VainuBappu望远镜的CCD进行了BVRI四色测光。本文给出了这115颗恒星的位置、绝对自行和成员概率数据，同时，还给出了用VainuBappu望远镜的CCD获得的这些恒星的BVRIM光数据。Absolute proper motions of 115 stars down to B = 17. 6 in an about 11' × 11' region of the cluster NGC 4147 were determined. In the astrometric reduction, three earlier epoch plates taken with the 4ocm refractor (f = 6895mm ) at Sheshan station, Shanghai Astronomical observatory, in 1958 and recent four B - passband CCD frames taken with the 2. 34m Vainu Bappu telescope (f = 7558mm ) at Kavalur, India were used. In addition, the data given by Brosche et al. (1985) were used as a reference frame and a set of earlier epoch positions. The reduction was done with the central overlapping principle. Membership probabilities of the stars were estimated from their proper motions. Furthermore, BVRI CCD photometry was made with the Vainu Bappu telescope. A catalogue with the astrometric and photometric data as well as membership probabilities of the 115 stars is given here.

关 键 词：球状星团 恒星 绝对自行 照相天体测量 BVRI测光 

分 类 号：P154.12[天文地球—天文学] P123