Cataclysmic variables in the ROSAT PSPC All Sky Survey.

Details Cataclysmic variables in the ROSAT PSPC All Sky Survey. Cataclysmic variables in the ROSAT PSPC All Sky Survey.

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...327..602v&link_type=abstract

Astronomy and Astrophysics, v.327, p.602-613

Astronomy and Astrophysics

Astrophysics

127

Cataclysmic Variables, Globular Clusters, X-Rays: Stars

Scientific paper

91 cataclysmic variables from a sample of 162 systems with known or suspected binary periods were detected during the ROSAT XRT-PSPC All Sky Survey. Among the non-magnetic systems, the X-ray to optical/ultraviolet flux ratio decreases along the sequence SU UMa type - U Gem type - Z Cam type - UX UMa type, due mainly to variations in the optical/ultraviolet flux. 8 of the 10 brightest systems in terms of total PSPC countrate are magnetic systems. The 0.5-2.5keV X-ray luminosities range up to ~10^32^erg/s, the highest luminosities being those of four faraway DQ Her type systems. The other types of cataclysmic variables all have similar 0.5-2.5keV luminosity distributions. In an Appendix we compare the X-ray properties of cataclysmic variables with those of the dim X-ray sources in globular clusters.

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