UBVRI field comparison stars for selected active quasars and BL Lacertae objects
Paul S. SmithNew Mexico, University, AlbuquerqueT. J. BalonekP. A. HeckertCalifornia State University, San BernardinoR. ElstonGary D. Schmidt
1985en
ABI
Annotatsiya
The authors present UBV (Johnson) and RI (Cousins) magnitudes of field comparison stars for several active quasars and BL Lacertae objects. The comparison stars can be used for photoelectric and CCD monitoring of the variability in brightness and optical-continuum spectral index of these BL Lacs and QSOs.
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