Geometry and optics calibration of WFCTA prototype telescopes using star light
Geometry and optics calibration of WFCTA prototype telescopes using star light
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使用星光对 WFCTA 原型望远镜进行几何和光学校准
DOI：
10.1088/1674-1137/35/5/015
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发表时间：
2010-08
影响因子：
3.6
通讯作者：
He Hui-Hai
中科院分区：
文献类型：
--
作者：
Bai Yun-Xiang;Zhou Bin;Cao Zhen;Chen Ming-Jun;Chen Li-Hong;Chen Song-Zhan;Chen Yao;Ding Kai-Qi;He Hui-Hai
大型高空空气簇射天文台项目拟研究高能伽马射线天文学（40 GeV-1 PeV）和宇宙射线物理（20 TeV-1 EeV）。宽视场切伦科夫望远镜阵列作为LHAASO项目的组成部分，将用于通过测量空气簇射和簇射最大深度产生的切伦科夫光总量来研究宇宙线的能谱和成分。自 2008 年以来，已有两台原型望远镜投入使用。每台望远镜的指向精度对于初级粒子的方向重建至关重要。另一方面，一次能量重建依赖于相机上切伦科夫图像的形状以及由于光电倍增管之间的不完美连接而未记录的光子。紫外亮星被用作点状物体来校准指向并研究相机的光学特性、光斑大小以及相机不敏感区域中未记录的光子的分数。
The Large High Altitude Air Shower Observatory project is proposed to study high energy gamma ray astronomy ( 40 GeV-1 PeV ) and cosmic ray physics ( 20 TeV-1 EeV ). The wide field of view Cherenkov telescope array, as a component of the LHAASO project, will be used to study energy spectrum and compositions of cosmic ray by measuring the total Cherenkov light generated by air showers and shower maximum depth. Two prototype telescopes have been in operation since 2008. The pointing accuracy of each telescope is crucial to the direction reconstruction of the primary particles. On the other hand the primary energy reconstruction relies on the shape of the Cherenkov image on the camera and the unrecorded photons due to the imperfect connections between photomultiplier tubes. UV bright stars are used as point-like objects to calibrate the pointing and to study the optical properties of the camera, the spot size and the fractions of unrecorded photons in the insensitive areas of the camera.