EDP Sciences
Free access
Volume 444, Number 2, December III 2005
Page(s) 561 - 564
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20054002

A&A 444, 561-564 (2005)
DOI: 10.1051/0004-6361:20054002

INTEGRAL broadband X-ray spectrum of the intermediate polar V709 Cassiopeiae

M. Falanga1, 2, J. M. Bonnet-Bidaud1 and V. Suleimanov3, 4, 5

1  CEA Saclay, DSM/DAPNIA/Service d'Astrophysique (CNRS FRE 2591), 91191 Gif-sur-Yvette, France
    e-mail: mfalanga@cea.fr
2  Unité mixte de recherche Astroparticule et Cosmologie, 11 place Berthelot, 75005 Paris, France
3  Kazan State University, Kremlevskaya str. 18, 420008 Kazan, Russia
4  Astronomy Division, PO Box 3000, 90014 University of Oulu, Finland
5  Kazan Branch of Isaac Newton Institute, Santiago, Chile

(Received 6 August 2005 / Accepted 14 September 2005 )

We present the hard X-ray time-averaged spectrum of the intermediate polar V709 Cas observed with INTEGRAL. We performed the observation using data from the IBIS/ISGRI instrument in the 20-100 keV energy band and from JEM-X at lower energy (5-20 keV). Using different multi-temperature and density X-ray post-shock models we measured an improved post-shock temperature of ~40 keV and estimated the V709 Cas mass to be 0.82 +0.12-0.25 $M_{\odot}$. We compare the resulting spectral parameters with previously reported BeppoSAX and RXTE observations.

Key words: binaries: general -- stars: individual: V709 Cas -- X-rays: stars

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