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Title:
RXTE confirmation of the intermediate polar status of IGR J15094-6649
Authors:
Butters, O. W.; Norton, A. J.; Mukai, K.; Barlow, E. J.
Affiliation:
AA(Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK ; Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK), AB(Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK), AC(CRESST and X-ray Astrophysics Laboratory NASA/GSFC, Greenbelt, MD 20771, USA ; Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA), AD(Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK)
Publication:
Astronomy and Astrophysics, Volume 498, Issue 2, 2009, pp.L17-L19 (A&A Homepage)
Publication Date:
05/2009
Origin:
EDP Sciences
Keywords:
stars: binaries: general, stars: novae, cataclysmic variables, stars:, individual: IGR J15094-6649, X-rays: binaries
DOI:
10.1051/0004-6361/200911725
Bibliographic Code:
2009A&A...498L..17B

Abstract

Aims: We aim 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 17 ± 4 keV Bremsstrahlung or Γ = 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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