UBVRI photometry of stars in the fields of X-ray selected BL Lacertae objects
UBVRI photometry of stars in the fields of X-ray selected BL Lacertae objects
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DOI：
10.1086/191598
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发表时间：
1991-09
影响因子：
8.7
通讯作者：
Paul S. Smith;B. Jannuzi;R. Elston
中科院分区：
文献类型：
--
作者：
Paul S. Smith;B. Jannuzi;R. Elston
本文介绍了38个X射线选择BL蝎虎族天体、两个X射线选择活动星系核和一个X射线双星系统（可能是激变变星）的UVVRI测光结果。这些恒星适合用作光度比较星，用于涉及这些X射线选定天体的光学监测方案。在七个测光夜晚，总共对87颗恒星进行了166次观测。在每一个领域至少观察到两颗星。在MS 0950.9 + 4929、MS 1552.1 + 2020和H 2154 - 304的视场中对三颗恒星进行了UBVRI测量。在H 1426 + 428的视场中测量了四颗星。查找所有这些对象的图表都包括在内。
UBVRI photometry is presented of stars in the fields of 38 X-ray selected BL Lacertae objects, two X-ray selected AGNs, and one X-ray binary system (possibly a cataclysmic variable). These stars are suitable for use as photometric comparison stars for optical monitoring programs involving these X-ray selected objects. A total of 166 observations of 87 stars were made on seven photometric nights. At least two stars were observed in every field. UBVRI measurements of three stars were made in the fields of MS 0950.9 + 4929, MS 1552.1 + 2020, and H 2154 - 304. Four stars were measured in the field of H 1426 + 428. Finding charts for all of these objects are included.