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Observations of the Crab Nebula at energies 4.10(11)Since the development of gamma-ray astronomical telescopes, the Crab Nebula has been a prime target for observations. From 100 to 1000 MeV, the pulsar PSR0531 is the dominant source with a light-curve similar to that seen at lower energies; there is also some evidence for longterm amplitude variations but none for emission from the Nebula itself. In the very high energy gamma-ray region there have been reported detections of pulsed emission with longterm time variations from minutes to months. Recently a pulsed flux has been reported that resisted over a long time interval. The detection of a flux from the Nebula at the 3 sigma level at energies of 3x1011eV was reported; there was no evidence of periodic emissions on any time scale during the three years of observations. A new measurement of very high energy gamma rays from the Crab Nebula is reported using the imaging system on the Whipple Observatory 10m reflector.
Document ID
19850025625
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cawley, M. F.
(University Coll. Dublin, Ireland)
Regan, D. J.
(University Coll. Dublin, Ireland)
Gibbs, K.
(Harvard-Smithsonian Center for Astrophysics Dublin, Ireland)
Gorham, P. W.
(Hawaii Univ.)05(Iowa State Univ. Dublin, Ireland)
Lamb, R. C.
(University Coll.)
Liebing, D. F.
(Iowa State Univ.)
Mackeown, P. K.
(Hong Kong Univ.)
Porter, N. A.
(University Coll.)
Stenger, V. J.
(Hawaii Univ.)
Weekes, T. C.
(Harvard-Smithsonian Center for Astrophysics)
Date Acquired
August 12, 2013
Publication Date
August 1, 1985
Publication Information
Publication: 19th Intern. Cosmic Ray Conf - Vol. 1
Subject Category
Space Radiation
Report/Patent Number
OG-2.3-1
Report Number: OG-2.3-1
Accession Number
85N33938
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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