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Gamma rays of 0.3 to 30 MeV from PSR 0531+21Pulsed gamma rays from the Crab Pulsar PSR 0531+21 are reported for energies of 0.3 to 30 MeV. The observations were carried out with the UCR gamma ray double Compton scatter telescope launched on a balloon from Palestine, Texas at 4.5 GV, at 2200 LT, September 29, 1978. Two 8 hr observations of the pulsar were made, the first starting at 0700 UT (0200 LT) September 30 just after reaching float altitude of 4.5 g/sq cm. Analysis of the total gamma ray flux from the Crab Nebula plus pulsar using telescope vertical cell pairs was published previously. The results presented supersede the preliminary ones. The double scatter mode of the UCR telescope measures the energy of each incident gamma ray from 1 to 30 MeV and its incident angle to a ring on the sky. The time of arrival is measured to 0.05 ms. The direction of the source is obtained from overlapping rings on the sky. The count rate of the first scatter above a threshold of 0.3 MeV is recorded every 5.12 ms. The Crab Pulsar parameters were determined from six topocentric arrival times of optical pulses.
Document ID
19850025632
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
White, R. S.
(California Univ. Riverside, CA, United States)
Sweeney, W.
(California Univ. Riverside, CA, United States)
Tuemer, T.
(California Univ. Riverside, CA, United States)
Zych, A. D.
(California Univ. Riverside, CA, United States)
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-2.3-8
Report Number: OG-2.3-8
Accession Number
85N33945
Funding Number(s)
CONTRACT_GRANT: NGR-05-008-022
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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