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arXiv 1709.05352astro-ph.IM
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用康普顿光谱仪和成像仪进行极大似然康普顿偏振测量

Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager

Alexander W. Lowell, Steven E. Boggs, Jeng-Lun Chiu, Carolyn A. Kierans, Clio C. Sleator, John A. Tomsick, Andreas C. Zoglauer, Hsiang-Kuang Chang, Chao-Hsiung … 展开作者

Alexander W. Lowell, Steven E. Boggs, Jeng-Lun Chiu, Carolyn A. Kierans, Clio C. Sleator, John A. Tomsick, Andreas C. Zoglauer, Hsiang-Kuang Chang, Chao-Hsiung Tseng, Chien-Ying Yang, Pierre Jean, Peter von Ballmoos, Chih-Hsun Lin, Mark Amman

摘要:

由于部署了具有高位置和能量分辨率的探测器,在软伽马射线波段进行天体物理偏振测量变得更加可行。以前的工作已经表明,最小可检测的偏振(MDP)的理想康普顿偏振计可以改善$\sim 21\%$时,使用一个unbinned,极大似然的方法,而不是标准的方法拟合的正弦曲线的散射角的方位角直方图。在这里,我们概述了一个程序,实现这种极大似然的方法,真正的,非理想的偏振计。作为一个例子,我们使用最近的观测伽玛暴160530 A的康普顿光谱仪和成像仪。我们发现,该观察的MDP减少了$20\%$时,使用的极大似然方法,而不是标准的方法。

英文摘要:

Astrophysical polarization measurements in the soft gamma-ray band are becoming more feasible as detectors with high position and energy resolution are deployed. Previous work has shown that the minimum detectable polarization (MDP) of an ideal Compton polarimeter can be improved by $\sim 21\%$ when an unbinned, maximum likelihood method is used instead of the standard approach of fitting a sinusoid to a histogram of azimuthal scattering angles. Here we outline a procedure for implementing this maximum likelihood approach for real, non-ideal polarimeters. As an example, we use the recent observation of GRB 160530A with the Compton Spectrometer and Imager. We find that the MDP for this observation is reduced by $20\%$ when the maximum likelihood method is used instead of the standard method.

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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