The overlapping open clusters NGC 1750 and NGC 1758 - II. BVR photographic photometry and proper motions

被引:7
作者
Galadi-Enriquez, D
Jordi, C
Trullols, E
Guibert, J
Tian, KP
Zhao, JL
机构
[1] Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain
[2] Univ Politecn Catalunya, Dept Matemat Aplicada & Telemat, E-08800 Vilanova Geltru, Spain
[3] Observ Paris, Ctr Anal Images, F-75014 Paris, France
[4] CAS, Shanghai Astron Observ, Shanghai 200030, Peoples R China
来源
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1998年 / 131卷 / 02期
关键词
open clusters and associations : individual : NGC 1746; open clusters and associations : individual : NGC 1750; open clusters and associations : individual : NGC 1758; methods : astrometry;
D O I
10.1051/aas:1998433
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Astrometry (positions and proper motions) and photographic BVR photometry were determined from a set of 29 photographic plates and CCD data in a region of 2.3 degrees x 2.3 degrees in the area of open clusters NGC 1750 and NGC 1758 in Taurus. The iterative central overlap algorithm was used for the proper motion calculations. Plate-to-plate transformations and astrometric magnitude effects are discussed in detail. CCD data interact with photographic material ill three different ways: for the elimination of astrometric magnitude effects,, for the photometric standard calibration of photographic plates and for building a CCD pseudo-plate used for astrometric purposes as any other photographic plate. A preliminary analysis of the resulting photometric and astrometric catalogue con firmed the reality of two different clusters in the zone (NGC 1750 and NGC 1758). There were no indications for the existence of NGC 1746.
引用
收藏
页码:239 / 258
页数:20
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