中国物理B ›› 1999, Vol. 8 ›› Issue (1): 63-70.doi: 10.1088/1004-423X/8/1/011

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

PULSED EMISSION OF VERY HIGH ENERGY GAMMA RAYS FROM CRAB PULSAR

徐春娴, 何会林, 何会海, 陈永中, 李辉东, 姜印琳   

  1. Laboratory of Cosmic Ray and High Energy Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
  • 收稿日期:1998-05-05 出版日期:1999-01-20 发布日期:1999-01-20
  • 基金资助:
    Project supported especially by the President Foundation of the Chinese Academy of Sciences, and by the National Natural Science Foundation of China (Grant No.19135032).

PULSED EMISSION OF VERY HIGH ENERGY GAMMA RAYS FROM CRAB PULSAR

Xu Chun-xian (徐春娴), He Hui-lin (何会林), He Hui-hai (何会海), Chen Yong-zhong (陈永中), Li Hui-dong (李辉东), Jiang Yin-lin (姜印琳)   

  1. Laboratory of Cosmic Ray and High Energy Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
  • Received:1998-05-05 Online:1999-01-20 Published:1999-01-20
  • Supported by:
    Project supported especially by the President Foundation of the Chinese Academy of Sciences, and by the National Natural Science Foundation of China (Grant No.19135032).

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摘要： We present here the results of observation of very high energy(VHE) gamma-ray emission from Crab Pulsar with the Beijing Atmospheric Cerenkov Telescopes, named ACT2 and ACT3, during the 1995－1996 season. The data are based on 168 h (ACT2) and 125 h (ACT3) of exposure over the period of observation in tracking mode. After converting the event time to the solar barycentre, the data have been searched for evidence of pulsed emission at 33 ms period of Crab Pulsar. We found no steady emission of VHE Gamma-ray with 33 ms period at the time scale of month or nights. But there are two evidences of sporadic emission over an hour duration with the same period as the one at radio wave band.

Abstract: We present here the results of observation of very high energy(VHE) gamma-ray emission from Crab Pulsar with the Beijing Atmospheric Cerenkov Telescopes, named ACT2 and ACT3, during the 1995－1996 season. The data are based on 168 h (ACT2) and 125 h (ACT3) of exposure over the period of observation in tracking mode. After converting the event time to the solar barycentre, the data have been searched for evidence of pulsed emission at 33 ms period of Crab Pulsar. We found no steady emission of VHE Gamma-ray with 33 ms period at the time scale of month or nights. But there are two evidences of sporadic emission over an hour duration with the same period as the one at radio wave band.

中图分类号:  (Pulsars)

  • 97.60.Gb
98.70.Rz (γ-ray sources; γ-ray bursts) 95.80.+p (Astronomical catalogs, atlases, sky surveys, databases, retrieval systems, archives, etc.)