COMPTEL observations of the Crab during the CGRO sky survey

Authors

R Much, ESTEC
K Bennett, ESTEC
R Buccheri, IFCAI
M Busetta, ESTEC
R Diehl, Max-Planck-Institut für extraterrestriche Physik
D J. Forrest, University of New Hampshire - Main Campus
W Hermsen, Space Research Organization of the Netherlands (SRON)
L Kuiper, Space Research Organization of the Netherlands (SRON)
G G. Lichti, Max-Planck-Institut für extraterrestrische Physik
Mark L. McConnell, University of New Hampshire - Main CampusFollow
James M. Ryan, University of New HampshireFollow
V. Schonfelder, Max-Planck-Institut für extraterrestriche PhysikFollow
H Steinle, Max-Planck-Institut für extraterrestriche Physik
A W. Strong, Max-Planck-Institut für extraterrestriche Physik
M Varendorff, Max-Planck-Institut für extraterrestrische Physik

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.

Department

Physics

Publication Date

7-1995

Journal Title

Astronomy and Astrophysics

Publisher

European Southern Observatory (ESO)

Document Type

Article

Recommended Citation

R. Much, K. Bennett, R. Buccheri, M. Busetta, R. Diehl, D. Forrest, W. Hermsen, L. Kuiper, G.G. Lichti, M. McConnell, J. Ryan, V. Schönfelder, H. Steinle, A. Strong, and M. Varendorff. COMPTEL OBSERVATIONS OF THE CRAB DURING THE CGRO SKY SURVEY. 1995, Astron. Astrophys., 299, 435.