Abstract
We discuss selected results of observations of cataclysmic variables (CVs) and related objects by the instruments IBIS (far X-ray and gamma-ray imager) and OMC (Optical Monitoring Camera) onboard INTEGRAL . We concentrate on the analysis of the time behaviour of the intermediate polar (IP) V1223 Sgr, seen simultaneously by IBIS and OMC in a state which we call a shallow low state. We present far X-ray spectra ( E up to 60 keV) and the relation between far X-ray and optical flux. We demonstrate the stability of this relation and of the profile of the X-ray spectra during this state over an interval of 400 days. We also present far X-ray observations of some other magnetic CVs and show that the systems with magnetized white dwarf (like polars and IPs) appear to be the most promising CVs for INTEGRAL . We also include the examples of the OMC light curves and show that the outburst and a low state of IX Vel are caused by the mass transfer variations, and not by the thermal instability of the disk.
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