大天顶距Gamma-Ray资料的Disp分析方法
The Disp Method for Analysing Large Zenith Angle Gamma-Ray Data
摘要：
Disp方法是一种用于在地基大气切伦科夫望远镜实验中重建主伽马射线方向的算法-测量能量范围在100 GeV和30 TeV之间的甚高能（VHE）伽马射线。一般来说，从一个单一的阵雨图像获得的几何信息是足够的算法找到的天空位置的主要。过去实现并使用了各种版本的Disp方法。在这项研究中，我们提出了一个多维的实现的VERITAS仪器和显示（使用蒙特卡罗模拟和蟹状星云观测），它显着提高了大天顶角（LZA）观测的角分辨率的Disp方法。我们还应用了disp方法从银河系中心区域的VERITAS数据，这是由VERITAS检测。
英文摘要：
The Disp method is an algorithm that is used for reconstruction of primary gamma ray direction in ground- based atmospheric Cherenkov telescope experiments -measuring very-high-energy (VHE) gamma rays in the energy range between 100GeV and 30 TeV. In general terms, the geometric information obtained from one single shower image is sufficient for the algorithm to find the sky location of the primary. Various versions of the Disp method were implemented and used in the past. In this study, we present a multi-dimensional implementation of the Disp method for the VERITAS instrument and show (using Monte Carlo simulations and the Crab Nebula observations) that it significantly improves the angular resolution for large-zenith-angle (LZA) observations. We also applied the disp method to VERITAS data taken from the galactic center region which is detected by VERITAS.
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