Secondary Photometric Standards for Northern Cataclysmic Variables and Related Objects

An average of 30 B,V secondary standards per field have been established for 76 variable stars. These are mostly cataclysmic variables of various subclasses but also include a variety of other kinds of variable stars. The standards are within a few arc minutes of the variable and are therefore well suited for CCD photometry. The standards have brightnesses of V ∼ 12-17 and have a typical accuracy per standard of ± 0.01 mag.