γ射线暴是一种在短时间内释放巨大能量的极端天体现象，一直是天体物理和宇宙线物理的研究热点，但在100GeV及以上能区至今尚未获得确定的观测结果。本项目利用羊八井国际宇宙线观测站高海拔的独特优势，分析ARGO实验的"双前峰面"事例和新升级的ASγ联合实验（Tibet-III+MD）的数据，寻找甚高能区的γ射线暴，结合卫星实验与地面实验对γ射线暴的观测结果，分析高能爆发现象的时变规律。本项目的重点是提高实验探测γ射线暴的灵敏度，为此，计划通过"双前峰面"事例的分析来降低ARGO实验的探测阈能；符合Tibet-III和MD两种模式的数据来提高ASγ联合实验的γ/强子鉴别能力。 本项目的研究，为解决γ射线暴的基本问题、深入理解宇宙线的起源和高能辐射机制提供重要信息，为今后探测高能爆发现象的地面实验提供经验和依据。

GRB, a violent energy release within a short time,is a extreme astronomical phenomeon. The study of this phenomeon has been a hot spot in astrophysics and cosmic rays. But no significant E>100GeV GRBs were detected. Due to the unique advantage of YBJ high altitude, we plan to search for VHE GRBs using "double front" event in ARGO and ASγ (Tibet-III+MD)data. We also plan to analyze the temporal variations of the high-energy explosions through the results of satellite experiments and ground experiments.The focus of this project is to improve the sensitivity of ARGO and ASγ in detecting GRBs. So we plan to reduce the threshold energy of ARGO through the analysis of "double front" event, improve the ability to discriminate γ/hardon by coincident with Tibet-III data and MD data. The study of this project will provide important information about the basic questions of GRBs,the origin and the radiation mechanism of cosmic rays. At the same time, it will provide experience and the basis for ground experiments in detecting higher energy explosions in the future.