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

Abstract

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.

6 pages, 3 figures. To be published in ApJ

Cited by in corpus (5)

• The Crab pulsar in the 0.75-30 MeV range as seen by CGRO COMPTEL
• High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope
• Insight-HXMT observations of the Crab pulsar
• Pulse profile stability of the Crab pulsar
• Further Evidence for Collimated Particle Beams from Pulsars, and Precession