RXTE determination of the intermediate polar status of XSS J00564+4548, IGR J17195–4100, and XSS J12270–4859
Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK e-mail: email@example.com
2 Tuorla Observatory, University of Turku, 21500 Piikkiö, Finland
3 CRESST and X-ray Astrophysics Laboratory NASA/GSFC, Greenbelt, MD 20771, USA
Accepted: 24 May 2008
Methods. Pointed RXTE observations searched for intermediate polar characteristics in these candidate systems.
Results. XSS J00564+4548 exhibits a period of s, which we interpret as the spin period, an energy dependent modulation depth, and a spectrum that is fit by a 22 keV photoelectrically absorbed bremsstrahlung with an iron line profile. IGR J17195–4100 shows several candidate periodicities and a spectrum that is fit by a power law with an iron line. XSS J12270–4859 exhibits a candidate spin period of s and a spectrum that is fit by a power law with no evidence of an iron line.
Conclusions. XSS J00564+4548 is confirmed to be an intermediate polar. IGR J17195–4100 and XSS J12270–4859 both show some properties of intermediate polars, but cannot be confirmed as definite members of the class here.
Key words: binaries: close / stars: novae, cataclysmic variables / X-rays: binaries
© ESO, 2008