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arxiv: 0901.3983 · v1 · pith:ICSZCLZHnew · submitted 2009-01-26 · 🌌 astro-ph.SR · astro-ph.HE

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

classification 🌌 astro-ph.SR astro-ph.HE
keywords intermediatej15094-6649polarx-rayabsorptionanalysisemissionproperties
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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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