RXTE confirmation of the intermediate polar status of IGR J15094-6649

Details RXTE confirmation of the intermediate polar status of IGR J15094-6649 RXTE confirmation of the intermediate polar status of IGR J15094-6649

2009-01-26

arxiv.org/abs/0901.3983v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

3 pages, 5 figures. Submitted to A&A

Scientific paper

Aims. To establish the X-ray properties of the intermediate polar candidate IGR J15094-6649 and therefore confirm its inclusion into the class. Methods. 42 856 s of X-ray data from RXTE was analysed. Frequency analysis was used to constrain temporal variations and spectral analysis used to characterise the emission and absorption properties. Results. A spin period of 809.7+-0.6 s is present, revealed as a complex pulse profile whose modulation depth decreases with increasing X-ray energy. The spectrum is well fitted by either a 19+-4 keV Bremsstrahlung or Gamma=1.8+-0.1 power law, with an iron emission line feature and significant absorption in each case. Conclusions. IGR J15094-6649 is confirmed to be an intermediate polar.

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