RXTE confirmation of the intermediate polar status of Swift J0732.5-1331
RXTE confirmation of the intermediate polar status of Swift J0732.5-1331
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RXTE确认Swift J0732.5-1331的中间极性状态
DOI：
10.1051/0004-6361:20078700
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发表时间：
2007
影响因子：
6.5
通讯作者：
K. Mukai
中科院分区：
文献类型：
--
作者：
O. Butters;E. J. Barlow;A. Norton;K. Mukai
Aims. We intend to establish the X-ray properties of Swift J0732.5–1331 and therefore confirm its status as an intermediate polar. Methods. We analysed 36 240 s of X-ray data from RXTE. Frequency analysis was used to constrain temporal variations and spectral analysis used to characterise the emission and absorption properties. Results. The X-ray spin period is confirmed to be 512.4(3) s with a strong first harmonic. No modulation is detected at the candidate orbital period of 5.6 h, but a coherent modulation is present at the candidate 11.3 h period. The spectrum is consistent with a 37 keV bremsstrahlung continuum with an iron line at 6.4 keV absorbed by an equivalent hydrogen column density of around 10 22 atoms cm −2 . Conclusions. Swift J0732–1331 is confirmed to be an intermediate polar.
