Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-04
Astronomy and Astrophysics
Astrophysics
5 pages, 9 figures. Accepted for publication in A&A
Scientific paper
10.1051/0004-6361:200809942
Aims: We determine the nature of the intermediate polar candidates XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859. Methods: Pointed RXTE observations searched for intermediate polar characteristics in these candidate systems. Results: XSS J00564+4548 exhibits a period of 465.68+-0.07 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 859.57+-0.64 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.
Barlow E. J.
Butters Oliver W.
Hakala Pasi
Mukai Kazuhiko
Norton Andrew J.
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