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The ROSAT view of the cataclysmic variable sky |
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| Authors: | K Beuermann H -C Thomas |
| Institution: | * Universitäts-Sternwarte Göttingen, Geismarlandstr. 11, D-3400, Göttingen, Germany ** Max Planck Institut für Extraterrestrische Physik, D-8046 Garching b., München, Germany *** Max Planck Institut für Astrophysik, Garching b., München, Germany |
| Abstract: | The ROSAT All-Sky Survey has for the first time permitted a synoptic view of the soft X-ray sky with high sensitivity. In this paper, we discuss the X-ray properties of known cataclysmic variables (CVs) as observed in the Survey and present a status report on programs to identify CVs among the newly discovered ROSAT X-ray sources. Of 170 CVs with known orbital period, 92 were detected in the Survey and 22 of these fall in the bright-source category with more than 0.5 PSPC cts/s. Among the new bright sources, so far 19 have been identified as CVs and 3 as CV candidates, about doubling the census. We present spectra and light curves of known and new systems and discuss the origin of the X-ray emission in the different subclasses of CVs. |
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