论文标题
表征非波斯顿模板拟合的预期行为
Characterizing the Expected Behavior of Non-Poissonian Template Fitting
论文作者
论文摘要
我们已经对非波斯顿模板拟合（NPTF）的统计行为进行了系统的研究，该方法旨在分析和表征一般计数数据集中未解决的点源。在本文中，我们专注于费米 - 拉特伽马射线数据集的属性和特征。特别是，我们在不同的暴露条件，角度分辨率，像素大小，能量窗口，事件选择和源亮度的条件下模拟和分析了伽马射线天空图。我们描述了这些条件如何影响NPTF对点源的敏感性，对于银河中心过量的点源的内部 - 半核研究以及对各向同性发射的简化情况。我们找不到在当前的费米 - 拉特数据可用范围内改变这些选择的敏感性的重大收益的机会。我们提供了对各向同性发射和完美角度分辨率的点源的NPTF敏感性的分析估计，并与我们在该情况的数值结果中找到了良好的一致性。
We have performed a systematic study of the statistical behavior of non-Poissonian template fitting (NPTF), a method designed to analyze and characterize unresolved point sources in general counts datasets. In this paper, we focus on the properties and characteristics of the Fermi-LAT gamma-ray data set. In particular, we have simulated and analyzed gamma-ray sky maps under varying conditions of exposure, angular resolution, pixel size, energy window, event selection, and source brightness. We describe how these conditions affect the sensitivity of NPTF to the presence of point sources, for inner-galaxy studies of point sources within the Galactic Center excess, and for the simplified case of isotropic emission. We do not find opportunities for major gains in sensitivity from varying these choices, within the range available with current Fermi-LAT data. We provide an analytic estimate of the NPTF sensitivity to point sources for the case of isotropic emission and perfect angular resolution, and find good agreement with our numerical results for that case.
