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Search for gamma-rays above 400 GeV from GemingaObservations of Geminga made at the Whipple Observatory using the atmospheric Cherenkov technique during the moonless periods of November 1983 to February 1984 and November 1984 till February 1985 were examined for evidence for the emission of gamma rays with energy in excess of approx 400 GeV. Evidence of either a steady flux or a flux pulsed with a period near 60 seconds were studied. In neither case was any significant effect observed, enabling the establishment 3 of sigma upper limits of 5.5 x 10 to the -11th power photons/sq cm/s and 2.0 x 10 to the -11th power photons/sq cm/s for the steady and pulsed emission respectively. The limit to the pulsed flux is approximately a factor of six below that predicted.
Document ID
19850025638
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cawley, M. F.
(University Coll. Dublin, Ireland)
Fegan, D. J.
(University Coll. Dublin, Ireland)
Gibbs, K.
(Harvard-Smithsonian Center for Astrophysics Honolulu, United States)
Gorham, P. W.
(Hawaii Univ. Ames, United States)
Lamb, R. C.
(Iowa State Univ. Ames, United States)
Liebing, D. F.
(Iowa State Univ. Dublin, Ireland)
Mackeown, P. K.
(Hong Kong Univ. Honolulu, United States)
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-2.4-4
Report Number: OG-2.4-4
Accession Number
85N33951
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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