| Issue |
A&A
Volume 485, Number 3, July III 2008
|
|
|---|---|---|
| Page(s) | 787 - 795 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20079341 | |
| Published online | 28 April 2008 | |
The serendipituous discovery of a short-period eclipsing polar in 2XMMp*
1
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany e-mail: jvogel@aip.de
2
Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Received:
29
December
2007
Accepted:
9
April
2008
We report the serendipituous discovery of the new eclipsing polar 2XMMp J131223.4+173659. Its striking X-ray light curve attracted immediate interest when we were visually inspecting the source products of the 2XMMp catalogue. This light curve revealed its likely nature as a magnetic cataclysmic variable of AM Herculis (or polar) type with an orbital period of ~92 min, which was confirmed by follow-up optical spectroscopy and photometry. 2XMMp J131223.4+173659 probably has a one-pole accretion geometry. It joins the group of now nine objects that show no evidence of a soft component in their X-ray spectra despite being in a high accretion state, thus escaping ROSAT/EUVE detection. We discuss the likely accretion scenario, the system parameters, and the spectral energy distribution.
Key words: X-rays: stars / stars: binaries: eclipsing / stars: novae, cataclysmic variables / X-rays: binaries
© ESO, 2008
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