【摘要】 羊八井二期阵列 (TibetⅡ )和加密阵列HD(HighDensity)分别从 1 995年和 1 996年成功地运行以来 ,已经积累了大量的数据 .报道了利用TibetⅡ在1 995年 1 0月至 1 997年 9月、HD阵列在 1 997年 2月至 8月收集的数据寻找来自蟹状星云 (CrabNebula)方向的 1 0TeV和 3TeVγ射线稳定发射的初步结果 .分析表明 ,来自CrabNebula的 3TeVγ射线的累积信号事例数显示了稳定增长的趋势 ,显著性达到了 3.2σ,但没有发现 1 0TeV和 30TeVγ射线稳定发射的迹象更多还原

【Abstract】 A lot of data has been accumulated with Tibet Ⅱand HD AS array operated successfully since October of 1995 and 1996,respectivley. The preliminary results of searching for steady TeV gamma ray emissions from Crab Nebula with these data were presented in this paper. Analysis shows that the accumulative excess events of steady 3TeV gamma ray emissions from Crab Nebula was increasing stably and the statistical significance reached 3.2σ, whereas no statistical significant evidence of steady 10TeV and 30TeV gamma ray emissions was found.更多还原