EGRET Gamma-Ray Observations of the Crab P2/P1 Ratio
EGRET Gamma-Ray Observations of the Crab P2/P1 Ratio
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DOI：
10.1086/304604
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发表时间：
1997-05
期刊：
影响因子：
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通讯作者：
W. F. Tompkins;B. Jones;P. Nolan;G. Kanbach;P. Ramanamurthy;D. Thompson
中科院分区：
文献类型：
--
作者：
W. F. Tompkins;B. Jones;P. Nolan;G. Kanbach;P. Ramanamurthy;D. Thompson
康普顿伽马射线天文台的高能伽马射线实验望远镜（EGRET）最近对蟹状星云脉冲星的观测表明，高能伽马射线光变曲线在仪器的寿命期间变化不大。SAS 2和COS B在1972-1982年收集的数据，沿着早期EGRET数据，表明第一和第二峰值之间的通量比有14年的正弦变化。来自EGRET的新数据表明通量比是恒定的。
Recent observations of the Crab pulsar by the Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory show that the high-energy gamma-ray light curve has changed little over the lifetime of the instrument. Previous data collected by SAS 2 and COS B in the years 1972-1982, along with earlier EGRET data, suggested a 14 yr sinusoidal variation in the flux ratio between the first and second peaks. The new data from EGRET indicate that the flux ratio is constant.