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arXiv 0802.0441astro-ph
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快速X射线谱中的谱线拟合

Line Searches in Swift X-ray Spectra

C. P. Hurkett, S. Vaughan, J. P. Osborne, P. T. O'Brien, K. L. Page, A. Beardmore, O. Godet, D. N. Burrows, M. Capalbi, P. Evans, N. Gehrels, M. R. Goad, J. E. … 展开作者

C. P. Hurkett, S. Vaughan, J. P. Osborne, P. T. O'Brien, K. L. Page, A. Beardmore, O. Godet, D. N. Burrows, M. Capalbi, P. Evans, N. Gehrels, M. R. Goad, J. E. Hill, J. Kennea, T. Mineo, M. Perri, R. Starling

摘要:

在发射雨燕飞行任务之前,在伽马射线暴余辉光谱中报告了几次X射线线探测。到目前为止,这些前Swift时代的结果尚未得到最终证实。在这方面最有争议的问题是选择统计方法来评估这些功能的重要性。在本文中,我们比较了三种不同的方法已经存在于文献中,评估可能的线功能的意义,并讨论其相对的优点和缺点。通过应用于早期Swift XRT档案中的40个爆发的观测来证明这些方法(在爆发的其余帧中触发后<几k)。基于这种彻底的分析,我们没有发现发射谱线的有力证据。对于这三种方法中的每一种,我们都确定了具有斯威夫特时代样品典型光谱参数的突发发射线强度的检测限。我们还讨论了当前校准状态对发射线检测的影响。

英文摘要:

Prior to the launch of the Swift mission several X-ray line detections were reported in Gamma Ray Burst afterglow spectra. To date, these pre-Swift era results have not been conclusively confirmed. The most contentious issue in this area is the choice of statistical method used to evaluate the significance of these features. In this paper we compare three different methods already extant in the literature for assessing the significance of possible line features and discuss their relative advantages and disadvantages. The methods are demonstrated by application to observations of 40 bursts from the archive of Swift XRT at early times (< few ks post trigger in the rest frame of the burst). Based on this thorough analysis we found no strong evidence for emission lines. For each of the three methods we have determined detection limits for emission line strengths in bursts with spectral parameters typical of the Swift-era sample. We also discuss the effects of the current calibration status on emission line detection.

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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