First XMM-Newton observations of a cataclysmic variable II: the X-ray spectrum of OY Car

Details First XMM-Newton observations of a cataclysmic variable II: the X-ray spectrum of OY Car First XMM-Newton observations of a cataclysmic variable II: the X-ray spectrum of OY Car

2000-10-20

arxiv.org/abs/astro-ph/0010416v1

Astronomy and Astrophysics

Astrophysics

Accepted by A&A for publication in the special issue on XMM results, 4 pages

Scientific paper

10.1051/0004-6361:20000042

We present XMM-Newton X-ray spectra of the disc accreting cataclysmic variable OY Car, which were obtained during the performance verification phase of the mission. These data were taken 4 days after a short outburst. In the EPIC spectra we find strong iron Kalpha emission with weaker iron Kbeta emission together with silicon and sulphur lines. The spectra are best fitted with a three temperature plasma model with a partial covering absorber. Multiple temperature emission is confirmed by the emission lines seen in the RGS spectrum and the H/He like intensity ratio for iron and sulphur which imply temperatures of ~7keV and ~3keV respectively.

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