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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
2009
发表期刊ASTRONOMY & ASTROPHYSICS
卷号497期号:2页码:347-350
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
文章类型Article
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.
关键词X-rays: individuals: IGR J16460+0849
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1051/0004-6361/200810866
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000265097300004
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237085
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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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.
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