利用羊八井广延大气簇射阵列探测来自壳型超新星遗迹G40．5-0．5的TeV γ射线发射

Using observation data of the Yangbajing extensive air shower array from October 2000 to September 2001,the TeV gamma rays from the shell-like SNR 640.5-0.5 direction were detected.A region with the highest excess of 4.4Q was found using two dimensional analysis method.The position of EGRET unidentified source GeV J1907+0557 is near the centrer of the region.