Measurement of the energy spectrum of ultra-high energy cosmic rays using the Pierre Auger Observatory
Measurement of the energy spectrum of ultra-high energy cosmic rays using the Pierre Auger Observatory
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使用皮埃尔俄歇天文台测量超高能宇宙射线的能谱
DOI：
10.22323/1.358.0450
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
V. Verzi
中科院分区：
文献类型：
--
作者：
V. Verzi
本文介绍了俄歇天文台测量的超高能宇宙线能谱。测量得益于巨大的曝光量约80000 km^2 $ sr/年，在14年的数据采集与表面探测器阵列，延伸超过3000 km^2 $，有1600个探测器在1500米的间距，并从几乎量热估计的能量尺度提供的荧光探测器。
在这方面的贡献，我们解决了最近的改进，在测量光谱的能量高于3电子伏特的事件与天顶角小于60 ^\circ $。这些改进涉及簇射能量的估计及其分辨率。此外，我们报告的更新的能量谱来自其他独立和互补的数据集，即从淋浴与较大的天顶角，那些检测到的一个更小，更密集的阵列与750米的间距，和那些检测到的荧光探测器，连同最近扩展的通量测量，以降低能量使用大气切伦科夫辐射。
The energy spectrum of ultra-high energy cosmic rays measured using the Pierre Auger Observatory is presented. The measurements benefit from the huge exposure of approximately 80000 km$^2$ sr yr achieved in 14 years of data taking with a surface-detector array that extends over 3000 km$^2$ having 1600 detectors on a 1500 m spacing, and from the almost-calorimetric estimation of the energy scale provided by the fluorescence detector.
In this contribution, we address recent improvements in the measured spectrum at energies above 3 EeV using events with zenith angles less than $60^\circ$. These improvements concern the estimation of the shower energy and its resolution. Further, we report on updates of the energy spectra derived from other independent and complementary data sets, namely from showers with larger zenith angles, those detected by a smaller and denser array with 750 m spacing, and those detected by the fluorescence detector, together with the recent extension of the flux measurements to lower energies using atmospheric Cherenkov radiation.