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Recent results on celestial gamma radiation from SMMObservations made by the Gamma Ray Spectrometer on board the SMM are described. Recent results reported include observations and analyses of gamma-ray lines from Co-56 produced in supernovae, observations of the temporal variation of the 511 keV line observed during Galactic center transits, and measurements of the diffuse Galactic spectrum from 0.3 to 8.5 MeV. The work in progress includes measurements of the distribution of Galactic Al-26, observations to place limits on Galactic Ti-44 and Fe-60 and on Be-7 produced in novae, and searches for a characteristic gamma-ray emission from pair plasmas, a 2.223 MeV line emission, limits on deexcitation lines from interstellar C and O, and gamma-ray bursts.
Document ID
19910068841
Document Type
Reprint (Version printed in journal)
Authors
Share, Gerald H. (U.S. Navy, E.O. Hulburt Center for Space Research, Washington DC, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Advances in Space Research
Volume: 11
Issue: 8 19
ISSN: 0273-1177
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NASA ORDER S-14513-D
Distribution Limits
Public
Copyright
Other