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arXiv 1601.08138astro-ph.HE
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关于IGR ~ J19149 +1036的Swift视图

A Swift view on IGR~J19149+1036

G. Cusumano, A. Segreto, V. La Parola, N. Masetti, A. D'Aì, G. Tagliaferri

摘要:

IGR~J19149+1036是INTEGRAL于2011年在硬X射线领域探测到的一颗高质量X射线双星。我们分析了Swift任务前103个月的BAT调查数据,发现该来源的显着性水平约为30个标准差。对BAT长期光变曲线的时间分析揭示了22.25+/- 0.05 d的强正弦强度调制的存在,我们将其解释为该双星系统的轨道周期。结合BAT光谱和来自定点跟踪观测的XRT光谱进行了宽带(0.3-150 keV)光谱分析。该光谱是充分模拟吸收功率法与高能量截止在~24 keV和吸收回旋特征在~31 keV。校正引力红移后,推断出中子星表面的磁场为B_surf ~ 3.6 x 10^12高斯。

英文摘要:

IGR~J19149+1036 is a high mass X-ray binary detected by INTEGRAL in 2011 in the hard X-ray domain. We have analyzed the BAT survey data of the first 103 months of the Swift mission detecting this source at a significance level of ~30 standard deviations. The timing analysis on the long term BAT light curve reveals the presence of a strong sinusoidal intensity modulation of 22.25+/- 0.05 d, that we interpret as the orbital period of this binary system. A broad band (0.3-150 keV) spectral analysis was performed combining the BAT spectrum and the XRT spectra from the pointed follow up observations. The spectrum is adequately modeled with an absorbed power law with a high energy cutoff at ~24 keV and an absorption cyclotron feature at ~31 keV. Correcting for the gravitational redshift, the inferred magnetic field at the neutron star surface is B_surf ~ 3.6 x 10^12 gauss.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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