Possible hard X-ray shortages in bursts from KS 1731-260 and 4U 1705-44 (Research Note)

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	Possible hard X-ray shortages in bursts from KS 1731-260 and 4U 1705-44 (Research Note)
	Ji L(纪龙); Zhang S(张澍); Chen YP(陈玉鹏); Ji, L; Zhang, S; Chen, YP; Zhang, SN; Kretschmar, P; Wang, JM; Li, J
刊名	ASTRONOMY & ASTROPHYSICS
	2014
卷号	564 页码:A20
关键词	stars: coronae X-rays: binaries X-rays: bursts stars: neutron
英文摘要	Aims. A hard X-ray shortage, implying the cooling of the corona, was observed during bursts of IGR J17473-272, 4U 1636-536, Aql X-1, and GS 1826-238. Apart from these four sources, we investigate here an atoll sample, in which the number of bursts for each source is larger than 5, to explore the possible additional hard X-ray shortage during Rossi X-ray timing explorer (RXTE) era. Methods. According to the source catalog that shows type-I bursts, we analyzed all the available pointing observations of these sources carried out by the RXTE proportional counter array. We grouped and combined the bursts according to their outburst states and searched for the possible hard X-ray shortage while bursting. Results. We found that the island states of KS 1731-260 and 4U 1705-44 show a hard X-ray shortage at significant levels of 4.5 and 4.7 sigma and a systematic time lag of 0.9 +/- 2.1 s and 2.5 +/- 2.0 s with respect to the soft X-rays, respectively. While in their banana branches and other sources, we did not find any consistent shortage.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000334671000020
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224836]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Ji L,Zhang S,Chen YP,et al. Possible hard X-ray shortages in bursts from KS 1731-260 and 4U 1705-44 (Research Note)[J]. ASTRONOMY & ASTROPHYSICS,2014,564:A20.
APA	纪龙.,张澍.,陈玉鹏.,Ji, L.,Zhang, S.,...&李剑.(2014).Possible hard X-ray shortages in bursts from KS 1731-260 and 4U 1705-44 (Research Note).ASTRONOMY & ASTROPHYSICS,564,A20.
MLA	纪龙,et al."Possible hard X-ray shortages in bursts from KS 1731-260 and 4U 1705-44 (Research Note)".ASTRONOMY & ASTROPHYSICS 564(2014):A20.