First X-ray observations of the polar CE Gru

Details First X-ray observations of the polar CE Gru First X-ray observations of the polar CE Gru

2002-05-07

arxiv.org/abs/astro-ph/0205102v1

Mon.Not.Roy.Astron.Soc. 335 (2002) 918

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS, 6 pages

Scientific paper

10.1046/j.1365-8711.2002.05666.x

We report the detection of the polar CE Gru in X-rays for the first time. We find evidence for a dip seen in the hard X-ray light curve which we attribute to the accretion stream obscuring the accretion region in the lower hemisphere of the white dwarf. The X-ray spectrum can be fitted using only a shock model: there is no distinct soft X-ray component. We suggest that this is because the reprocessed component is cool enough so that it is shifted into the UV. We determine a mass for the white dwarf of ~1.0Msun.

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