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arXiv 1102.1228astro-ph.IM
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康普顿X射线偏振仪测量方位角和极散射角的数据分析

Analysis of the Data from Compton X-ray Polarimeters which Measure the Azimuthal and Polar Scattering Angles

Henric Krawczynski

摘要:

X射线偏振测量有可能为我们理解星系致密天体(如双黑洞系统和中子星)以及河外天体(如活动星系核、耀变体和伽马射线暴)做出关键贡献。此外,几个粒子天体物理学的主题可以解决,包括独特的灵敏度测试洛伦兹不变性。在10 keV到几MeV的能量范围内,康普顿旋光计达到最佳性能。在本文中,我们评估的好处,来自使用的方位角和极角的康普顿散射光子的分析,而不是单独使用的方位角散射角。我们研究的情况下,一个理想的康普顿旋光仪和表明,一个极大似然分析,它使用两个散射角降低了最小可检测偏振(MDP)的~20%相比,一个标准的分析的基础上的方位角散射角。可以测量偏振分数和偏振方向的精度提高了类似的量。最后,我们讨论了各种偏振计实验的极大似然分析方法的潜在应用。

英文摘要:

X-ray polarimetry has the potential to make key-contributions to our understanding of galactic compact objects like binary black hole systems and neutron stars, and extragalactic objects like active galactic nuclei, blazars, and Gamma Ray Bursts. Furthermore, several particle astrophysics topics can be addressed including uniquely sensitive tests of Lorentz invariance. In the energy range from 10 keV to several MeV, Compton polarimeters achieve the best performance. In this paper we evaluate the benefit that comes from using the azimuthal and polar angles of the Compton scattered photons in the analysis, rather than using the azimuthal scattering angles alone. We study the case of an ideal Compton polarimeter and show that a Maximum Likelihood analysis which uses the two scattering angles lowers the Minimum Detectable Polarization (MDP) by ~20% compared to a standard analysis based on the azimuthal scattering angles alone. The accuracies with which the polarization fraction and the polarization direction can be measured improve by a similar amount. We conclude by discussing potential applications of Maximum Likelihood analysis methods for various polarimeter experiments.

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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