INTEGRAL and Swift/XRT observations of IGR J16460+0849 (Research Note)

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	INTEGRAL and Swift/XRT observations of IGR J16460+0849 (Research Note)
	Zhang S(张澍); Chen YP(陈玉鹏); Wang JM(王建民); Li TB(李惕碚); Ge JQ(葛均强); Zhang, S; Chen, YP; Wang, JM; Li, TP; Ge, JQ
刊名	ASTRONOMY & ASTROPHYSICS
	2009
卷号	497 期号:2 页码:347-350
关键词	X-rays: individuals: IGR J16460+0849
通讯作者	[Zhang, S. ; Chen, Y. P. ; Wang, J. M. ; Li, T. P. ; Ge, J. Q.] Inst High Energy Phys, Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Wang, J. M.] Chinese Acad Sci, TPCSF, Beijing 100864, Peoples R China ; [Li, T. P.] Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China
英文摘要	Aims. IGR J16460+0849 is reported in the 3rd IBIS catalog with the shortest exposure of about 11 ks among all the detected sources, which makes it the most interesting target to be investigated with a deeper exposure. The currently available data have increased to an exposure time of a few hundred ks. This stimulates us to investigate the source again by using all the available data. Methods. We analyze all available observations carried out by the International Gamma-Ray Astrophysics Laboratory ( INTEGRAL) on the unidentified source IGR J16460+0849. The data were processed by using the latest version OSA 7.0. In addition we analyze also all the available Swift/XRT data on this source. Results. We find that IGR J16460+0849 has a detection significance of similar to 4.4 sigma in the 20-100 keV band during the observational period between March 2003 and September 2004, when it was exposed by similar to 19 ks. Thereafter the source was not detected anymore, despite an additional exposure of similar to 271 ks. This suggests a flux variability on a timescale of years. The spectral analysis shows that the IBIS/ISGRI data are well presented by a power-law shape, with a photon index obtained as 1.45 +/- 0.86. So far, the source has been detected consistently by IBIS/ISGRI in the subsequent observations and in the adjacent energy bands. We have analyzed the Swift/XRT observations on IGR J16460+0849 as well, and found no source inside the IBIS/ISGRI error circle. The non-detection during the Swift/XRT observation is consistent with the source having a variable nature.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000265097300004
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/237085]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang S,Chen YP,Wang JM,et al. INTEGRAL and Swift/XRT observations of IGR J16460+0849 (Research Note)[J]. ASTRONOMY & ASTROPHYSICS,2009,497(2):347-350.
APA	张澍.,陈玉鹏.,王建民.,李惕碚.,葛均强.,...&Ge, JQ.(2009).INTEGRAL and Swift/XRT observations of IGR J16460+0849 (Research Note).ASTRONOMY & ASTROPHYSICS,497(2),347-350.
MLA	张澍,et al."INTEGRAL and Swift/XRT observations of IGR J16460+0849 (Research Note)".ASTRONOMY & ASTROPHYSICS 497.2(2009):347-350.