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INTEGRAL and Swift/XRT observations of IGR J18179-1621
Li J(李剑); Zhang S(张澍); Li, J; Zhang, S; Torres, DF; Papitto, A; Chen, YP; Wang, JM; 陈玉鹏;王建民
2012
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号426期号:1页码:L16-L20
摘要IGR J18179-1621 is a hard X-ray binary transient discovered recently by INTEGRAL. Here we report on detailed timing and spectral analysis of IGR J18179-1621 in X-rays based on available INTEGRAL and Swift data. From the INTEGRAL analysis, IGR J18179-1621 is detected with a significance of 21.6s in the 1840 keV band by ISGRI and 15.3s in the 325 keV band by JEM-X, between 2012 February 29 and 2012 March 1. We analyse two quasi-simultaneous Swift ToO observations. A clear 11.82-s pulsation is detected above the white noise at a confidence level larger than 99.99 per cent. The pulse fraction is estimated as 22 +/- 8 per cent at 0.210 keV. No sign of pulsation is detected by INTEGRAL/ISGRI in the 1840 keV band. With Swift and INTEGRAL spectra combined in soft and hard X-rays, IGR J18179-1621 could be fitted by an absorbed power law with a high-energy cut-off plus a Gaussian absorption line centred at 21.5 keV. An additional absorption intrinsic to the source is found, while the absorption line is evidence for a most probable origin from cyclotron resonant scattering and suggests a magnetic field in the emitting region of 2.4 x 1012 G.
关键词X-rays: individual: IGR J18179-1621
学科领域Astronomy & Astrophysics
DOI10.1111/j.1745-3933.2012.01313.x
收录类别SCI
WOS记录号WOS:000309455800004
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被引频次:1[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/311005/224370
专题粒子天体物理中心
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Li J,Zhang S,Li, J,et al. INTEGRAL and Swift/XRT observations of IGR J18179-1621[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,426(1):L16-L20.
APA 李剑.,张澍.,Li, J.,Zhang, S.,Torres, DF.,...&陈玉鹏;王建民.(2012).INTEGRAL and Swift/XRT observations of IGR J18179-1621.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,426(1),L16-L20.
MLA 李剑,et al."INTEGRAL and Swift/XRT observations of IGR J18179-1621".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 426.1(2012):L16-L20.
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