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arXiv 0706.0832astro-ph
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X射线爆发器KS 1741-293的INTEGRAL高能监测

INTEGRAL high energy monitoring of the X-ray burster KS 1741-293

G. De Cesare, A. Bazzano, S. Martinez Nunez, G. Stratta, A. Tarana, M. De Santo, P. Ubertini

摘要:

KS 1741-293是1989年由和平号空间站Kvant舱中的X射线照相机TTM发现的,并被确定为一个X射线爆发源,但直到INTEGRAL天文台的出现才在硬X波段探测到。此外,这个来源最近也成为科学讨论的对象,也与附近的扩展射电源有关,原则上可能是由双星系统中的吸积引起的坍缩产生的超新星遗迹。从2003年2月到2005年5月,我们用INTEGRAL进行了长期监测,证实KS 1741-293在软X和硬X波段都是瞬变的。当源是活跃的,从一个同时的JEM-X和IBIS数据分析,我们提供了一个宽频带的频谱从5到100千电子伏,可以通过一个两个组件的模型,一个多黑体的软发射和康普顿或截止功率定律模型的硬组件。最后,通过对两个X射线爆发源的JEM-X探测,证实了KS 1741-293的爆发性质,并将其归入硬尾X射线爆发源的范畴。

英文摘要:

KS 1741-293, discovered in 1989 by the X-ray camera TTM in the Kvant module of the Mir space station and identified as an X-ray burster, has not been detected in the hard X band until the advent of the INTEGRAL observatory. Moreover this source has been recently object of scientific discussion, being also associated to a nearby extended radio source that in principle could be the supernova remnant produced by the accretion induced collapse in the binary system. Our long term monitoring with INTEGRAL, covering the period from February 2003 to May 2005, confirms that KS 1741-293 is transient in soft and hard X band. When the source is active, from a simultaneous JEM-X and IBIS data analysis, we provide a wide band spectrum from 5 to 100 keV, that can be fit by a two component model, a multiple blackbody for the soft emission and a Comptonized or a cut-off power law model for the hard component. Finally, by the detection of two X-ray bursters with JEM-X, we confirm the bursting nature of KS 1741-293, including this source in the class of the hard tailed X-ray bursters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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