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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; Zhang SN(张双南); Wang JM(王建民); Li J(李剑)
2014
发表期刊ASTRONOMY & ASTROPHYSICS
卷号564页码:A20
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.
关键词stars: coronae X-rays: binaries X-rays: bursts stars: neutron
学科领域Astronomy & Astrophysics
DOI10.1051/0004-6361/201322981
收录类别SCI
WOS记录号WOS:000334671000020
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224836
专题粒子天体物理中心
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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.
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