【摘要】 利用自行研制的两台大气切伦科夫望远镜（ＡＣＴ２和ＡＣＴ３），在１９９５年秋至１９９６年春的观测季节对蟹状星云脉冲星进行了１６８小时（ＡＣＴ２）和１２６小时（ＡＣＴ３）的跟踪观测．分析这些数据没有发现有月或天时间尺度稳定的３３ｍｓ周期的ＴｅＶγ射线发射，但发现两段持续几十分钟的暴发样本具有３３ｍｓ周期。更多还原

【Abstract】 We present here the results of observation of- very high energy(VHE) gamma - ray emission from Crab Pulsar with Beijing Atmospheric Cerenkov Telescopes, named ACT2 and ACT3, for the duration of the fall 1995-spring 1996 season. The data are based on 168 hours (ACT2) and 125 hours (ACT3) of exposure over the period of observation in tracking model. After conversion the event time to the solar barycenter, the data have been searched for evidence of pulsed emission at 33ms period of Crab Pulsar, We found no steady emission of VHE Gamma -ray with 33ms period at the scale of month or night. But there are two evidences of sporadic emission over an hour duration with the same period as the one at radio frequency.更多还原