The two most favored explanations of the Fermi Galactic Center gamma-ray excess (GCE) are millisecond pulsars and self annihilation of the smooth dark matter halo of the galaxy. In order to distinguish between these possibilities, we would like to optimally use all information in the available data, including photon direction and energy information. To date, analyses of the GCE have generally treated directional and energy information separately, or have ignored one or the other completely. Here, we develop a method for analyzing the GCE that relies on simulation-based inference with neural posterior models to jointly analyze photon directional and spectral information while correctly accounting for the spatial and energy resolution of the telescope, here assumed to be the Fermi Large Area Telescope (LAT). Our results also have implications for analyses of the diffuse gamma-ray background, which we discuss.

中文翻译：

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将基于模拟的推断应用于银河中心伽马射线过剩的光谱和空间信息


最受欢迎的两种解释费米银河中心伽马射线过剩（GCE）是毫秒脉冲星，是星系平滑暗物质晕的自湮灭。为了区分这些可能性，我们希望以最佳方式使用可用数据中的所有信息，包括光子方向和能量信息。迄今为止，GCE 的分析通常将方向信息和能量信息分开处理，或者完全忽略其中之一。在这里，我们开发了一种分析 GCE 的方法，该方法依赖于基于模拟的推理和神经后验模型来联合分析光子方向和光谱信息，同时正确考虑望远镜的空间和能量分辨率，这里假设为费米大视场望远镜（LAT）。我们的结果也对我们讨论的漫射伽马射线背景的分析有影响。