Telescope Array 10-Year Monocular Spectrum Measurement
Telescope Array 10-Year Monocular Spectrum Measurement
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望远镜阵列 10 年单目光谱测量
DOI：
10.22323/1.395.0339
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
G. Furlich
中科院分区：
文献类型：
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作者：
D. Bergman;G. Furlich
望远镜阵列（TA）是北方最大的宇宙线探测器。我们提出了一个测量的宇宙线能量超过1017.5 eV的单目模式使用荧光望远镜的能量谱。使用机器学习的新型天气分类方案来选择天气良好的数据部分，以确保荧光数据的质量。分别以单目模式分析了Black Rock梅萨（BR）和Long Ridge（LR）荧光望远镜站的数据，并将计算出的通量合并为一个光谱。10年单目组合宇宙线能谱与之前在北方半球的测量结果非常一致。我们提出了一系列的破幂律模型的组合谱拟合。考虑到每个自由度的泊松偏差，观察到三次破幂律是最佳拟合。这三个断裂表明了先前观察到的1018.7 eV处的Ankle和1019.8 eV处的GZK抑制之间的光谱的附加特征。
Telescope Array (TA) is the largest cosmic ray detector in the northern hemisphere. We present a measurement of the cosmic ray energy spectrum for energies above 1017.5 eV using fluorescence telescopes in monocular mode. A novel weather classification scheme using machine learning was used to select data parts with good weather to ensure the quality of the fluorescence data. The data from the Black Rock Mesa (BR) and Long Ridge (LR) fluorescence telescope stations were analysed separately in monocular mode, with the calculated fluxes combined into a single spectrum. The 10-year monocular combined cosmic ray energy spectrum is in excellent agreement with previous measurements from the northern hemisphere. We present fits of the combined spectrum to a series of broken power law models. A thrice-broken power law is observed to be the best fit considering the Poisson deviance per degrees of freedom. The three breaks suggest an additional feature of the spectrum between the previously observed Ankle at 1018.7 eV and the GZK suppression at 1019.8 eV.