We combine adaptive template fitting and pixel count statistics in order to assess the nature of the Galactic Center excess in Fermi-LAT data. We reconstruct the flux distribution of point sources well below the Fermi-LAT detection threshold, and measure their radial and longitudinal profiles in the inner Galaxy. We find that all point sources and the bulge-correlated diffuse emission each contributes $\mathcal{O}(10\%)$ of the total inner Galaxy emission, and disclose a potential subthreshold point-source contribution to the Galactic Center excess.

中文翻译：

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用γ射线像素计数统计剖析内部星系

我们结合自适应模板拟合和像素计数统计，以评估 Fermi-LAT 数据中银河中心过剩的性质。我们重建远低于 Fermi-LAT 检测阈值的点源的通量分布，并测量它们在内部星系中的径向和纵向轮廓。我们发现所有点源和与凸起相关的漫射发射都有贡献$\mathcal{哦}(10\%)$ 银河系内部总辐射的一部分，并揭示了对银河系中心过剩的潜在亚阈值点源贡献。