论文标题
首先观察带有km3net/orca的宇宙射线阴影和太阳
First observation of the cosmic ray shadow of the Moon and the Sun with KM3NeT/ORCA
论文作者
论文摘要
本文报道了对月球和宇宙射线诱发的宇宙射线探测器测量的宇宙射线诱导的muons的首次观察和太阳阴影。从2020年2月到2021年11月，分析的数据建设期跨越了检测器在地中海底部部署了6个检测单元，每个检测单元由18个数字光学模块组成。检测到月球和太阳引起的阴影，其统计显着性分别为4.2σ和6.2σ在其标称位置。这一早期结果证实了检测器校准的有效性，时间，位置和方向以及事件方向重建的准确性。这也证明了检测器指向精度和角度分辨率的性能和竞争力。
This article reports the first observation of the Moon and the Sun shadows in the sky distribution of cosmic-ray induced muons measured by the KM3NeT/ORCA detector. The analysed data-taking period spans from February 2020 to November 2021, when the detector had 6 Detection Units deployed at the bottom of the Mediterranean Sea, each composed of 18 Digital Optical Modules. The shadows induced by the Moon and the Sun were detected with a statistical significance of 4.2σ and 6.2σ, respectively, at their nominal position. This early result confirms the effectiveness of the detector calibration, in time, position and orientation and the accuracy of the event direction reconstruction. This also demonstrates the performance and the competitiveness of the detector in terms of pointing accuracy and angular resolution.
