PULSED EMISSION OF VERY-HIGH-ENERGY GAMMA -RAYS FROM CRAB PULSAR

We present here the results of observation of very high energy(VHE) ga mma-ray emission from Crab Pulsar with Beijing; Atmospheric Cerenkov T elescopes,. named ACT2 and ACT3, for the duration of the fall 1995-spr ing 1996 season. The data are based on 168 hours (ACT2) and 125 hours (ACT3) of exposure over the period of observation in tracking model. A fter conversion the event time to the solar barycenter, the data have been searched for evidence of pulsed emission at 33ms period of Crab P ulsar. We found no steady emission of VHE Gamma-ray with 33ms period a t 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 rad io frequency.