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

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

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