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Preprint J/05

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

Falanga, M. (1,2), Bonnet-Bidaud, J. M. (1), Suleimanov, V. (3,4)

(1) CEA Saclay, DSM/DAPNIA/Service d'Astrophysique (CNRS FRE 2591), 91191 Gif-sur-Yvette, France
(2) Unité mixte de recherche Astroparticule et Cosmologie, 11 place Berthelot, 75005 Paris, France
(3) Institut für Astronomie und Astrophysik - Astronomie, Sand 1, 72076 Tübingen, Germany
(4) Kazan State University, Kremlevskaya str. 18, 420008, Kazan, Russia

A&A 444, 561-564 (2005)

Abstract. 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⊙. We compare the resulting spectral parameters with previously reported BeppoSAX and RXTE observations.

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

Preprint (120 kb PDF file including figures)
astro-ph/0509489

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