论文标题
在Pierre螺旋钻天文台和望远镜阵列上测得的超高能宇宙射线的能量光谱
The energy spectrum of ultra-high energy cosmic rays measured at the Pierre Auger Observatory and at the Telescope Array
论文作者
论文摘要
超高能宇宙射线（UHECR）的能量光谱提供了有关宇宙中最有能力现象的基本信息。除了EEV能量之外，望远镜阵列和Pierre Auger天文台分别对有史以来在北半球和南半球积累的UHECR的暴露量最大。结果表明，在几十个EEV上方，能量谱的陡峭陡峭。但是，光谱的比较表明，从用于重建广泛的空气淋浴的能量量表上的总体不确定性方面，这些差异是无法解释的。在两种仪器覆盖的天空区域中也观察到差异，在考虑方向曝光效果时，光谱应在不确定性中一致。为此，考虑到能源依赖的系统不确定性，两项合作的工作组都检查了这些差异。特殊的重点是光谱特征的表征，该特征提供了一种准确的工具来增强我们对比较的理解。
The energy spectrum of ultra-high energy cosmic rays (UHECRs) provides essential information on the most energetic phenomena in the Universe. Beyond EeV energies, the Telescope Array and Pierre Auger Observatory have the largest exposures to UHECRs ever accumulated in the Northern and Southern hemispheres, respectively. The results show independently a steepening of the energy spectrum above a few tens of EeV. However, the comparison of the spectra shows differences that are not explainable in terms of an overall uncertainty on the energy scale used to reconstruct the extensive air showers. The differences are also observed in the region of the sky covered by both instruments, where the spectra should be in agreement within uncertainties when directional-exposure effects are accounted for. For this contribution, a working group from both collaborations examined these differences considering the energy-dependent systematic uncertainties. A special focus is given to the characterization of the spectral features, which provide an accurate tool to enhance our understanding of the comparisons.
