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UBVRI photometry of stars in the fields of X-ray selected BL Lacertae objects

Authors :
Smith, Paul S
Jannuzi, Buell T
Elston, Richard
Source :
Astrophysical Journal Supplement Series. 77
Publication Year :
1991
Publisher :
United States: NASA Center for Aerospace Information (CASI), 1991.

Abstract

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.

Subjects

Subjects :
Astronomy

Details

Language :
English
ISSN :
00670049
Volume :
77
Database :
NASA Technical Reports
Journal :
Astrophysical Journal Supplement Series
Notes :
NAS5-29293
Publication Type :
Report
Accession number :
edsnas.19910066713
Document Type :
Report
Full Text :
https://doi.org/10.1086/191598