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arXiv 0707.0995astro-ph
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静止中子星2S 1803 - 245 X射线瞬变的XMM-牛顿观测

An XMM-Newton observation of the neutron star X-ray transient 2S 1803-245 in quiescence

R. Cornelisse, R. Wijnands, J. Homan

摘要:

我们用X射线卫星XMM-Newton观测了处于静止状态的中子星2S 1803 - 245的X射线瞬变,但没有发现它。对1998年2S 1803 - 245爆发期间观测到的X射线爆发的分析给出了距离的上限<7.3 kpc,导致静态0.5 - 10 keV X射线亮度的上限<2.8 × 10^32 erg/s(3 sigma)。由于2S 1803 - 245的预期轨道周期是几个小时,这个极限并不比具有类似轨道周期的静止黑洞瞬变所观察到的高多少。

英文摘要:

We observed the neutron star X-ray transient 2S 1803-245 in quiescence with the X-ray satellite XMM-Newton, but did not detect it. An analysis of the X-ray bursts observed during the 1998 outburst of 2S 1803-245 gives an upper-limit to the distance of <7.3 kpc, leading to an upper-limit on the quiescent 0.5-10 keV X-ray luminosity of <2.8x10^32 erg/s (3sigma). Since the expected orbital period of 2S 1803-245 is several hrs, this limit is not much higher than those observed for the quiescent black hole transients with similar orbital periods.

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