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Record Details

Record 11 of 2803
Search for gamma-ray transients using the SMM spectrometer
Author and Affiliation:
Share, G. H.(U.S. Navy, Naval Research Lab., Washington, United States)
Harris, M. J.(Universities Space Research Association, Washington, United States)
Leising, M. D.(Clemson Univ., SC, United States)
Messina, D. C.(SFA, Inc., Landover, MD, United States)
Abstract: Observations for transient radiation made by the Gamma Ray Spectrometer on the SMM satellite are summarized. Spectra were obtained from 215 solar flares and 177 gamma-ray bursts. No narrow or moderately broadened lines were observed in any of the bursts. The rate of bursts is consistent with a constant over the mission but is weakly correlated with solar activity. No evidence was found for bursts of 511 keV line emission, unaccompanied by a strong continuum, at levels not less than 0.05 gamma/sq cm s for bursts lasting not more than 16 s. No evidence was found for broad features near 1 MeV from Cyg X-1, the Galactic center, or the Crab in 12-d integrations at levels not less than 0.006 gamma/sq cm s. No evidence was found for transient celestial narrow-line emission from 300 keV to 7 MeV on min-to-hrs-long time scales from 1984 to 1989.
Publication Date: Jan 01, 1993
Document ID:
19930044959
(Acquired Dec 28, 1995)
Accession Number: 93A28956
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: Astronomy and Astrophysics Supplement Series (ISSN 0365-0138); 97; 1; p. 341-344.
Publisher Information: France
Contract/Grant/Task Num: NASA ORDER W-17972
Financial Sponsor: NASA; United States
Organization Source: NASA; Washington, DC, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GAMMA RAY ASTRONOMY; GAMMA RAY BURSTS; GAMMA RAY SPECTROMETERS; SOLAR FLARES; SOLAR MAXIMUM MISSION; ASTRONOMICAL SPECTROSCOPY; EMISSION SPECTRA; GAMMA RAY SPECTRA
Imprint And Other Notes: Astronomy and Astrophysics Supplement Series vol. 97, no. 1 p. 341-344. Jan. 1993. Recent advances in high energy astronomy; Proceedings of the Toulouse International Symposium, Toulouse, France, Mar. 17-20, 1992. A93-28876 10-90, p. 341-344.
Availability Source: Other Sources
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