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XMM–Newton confirmation of a new intermediate polar: XMMU J185330.7−012815
Article first published online: 7 OCT 2011
DOI: 10.1111/j.1365-2966.2011.19692.x
© 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS
Issue
Monthly Notices of the Royal Astronomical Society
Volume 419, Issue 1, pages 314–320, January 2012
Additional Information
How to Cite
Hui, C. Y., Sriram, K. and Choi, C.-S. (2012), XMM–Newton confirmation of a new intermediate polar: XMMU J185330.7−012815. Monthly Notices of the Royal Astronomical Society, 419: 314–320. doi: 10.1111/j.1365-2966.2011.19692.x
Publication History
- Issue published online: 13 DEC 2011
- Article first published online: 7 OCT 2011
- Accepted 2011 August 24. Received 2011 August 23; in original form 2011 March 7
- Abstract
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Keywords:
- stars: individual: XMMU J185330.7−012815;
- novae, cataclysmic variables;
- X-rays: stars
ABSTRACT
We report on the results of a detailed spectro-imaging and temporal analysis of an archival XMM–Newton observation of a new intermediate polar XMMU J185330.7−012815. Its X-ray spectrum can be well described by a multitemperature thermal plasma model with the K lines of heavy elements clearly detected. Possible counterparts of XMMU J185330.7−012815 have been identified in optical and ultraviolet (UV) bands. The low values of the inferred X-ray-to-UV and X-ray-to-optical flux ratios safely rule out the possibility of its being an isolated neutron star. We confirm the X-ray periodicity of ∼238 s but, differently from the previous preliminary results, we do not find any convincing evidence of phase shift in this observation. We further investigate its properties through an energy-resolved temporal analysis and find that the pulsed fraction monotonically increases with energy.