COMPTEL observations of the Crab during the CGRO sky survey.
Abstract
During the all-sky survey of the Compton Gamma Ray Observatory (CGRO) the Crab pulsar and nebula were observed several times. The unprecedented exposure allows detailed spectral shape determination together with a phase-resolved study of the Crab pulsar in the 0.75-30MeV energy range. We show that, except for the second peak, the phase-resolved COMPTEL data cannot be described by a simple extrapolation of the higher energy (50MeV-10GeV) EGRET best-fit power-law. Evidence was found for time variability of the unpulsed emission on a time scale of 16 months.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1995
- Bibcode:
- 1995A&A...299..435M
- Keywords:
-
- GAMMA RAYS: OBSERVATIONS;
- PULSARS: GENERAL;
- PULSARS: INDIVIDUAL: PSR 0531+21;
- ISM: CRAB NEBULA