EGRET Gamma-Ray Observations of the Crab P2/P1 Ratio

Details EGRET Gamma-Ray Observations of the Crab P2/P1 Ratio EGRET Gamma-Ray Observations of the Crab P2/P1 Ratio

1997-05-05

arxiv.org/abs/astro-ph/9705025v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures. To be published in ApJ

Scientific paper

10.1086/304604

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 1972-82, along with earlier EGRET data, suggested a 14 year sinusoidal variation in the flux ratio between the first and second peaks. The new data from EGRET indicate that the flux ratio is constant.

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