Upper limits of narrow annihilation lines in gamma-ray bursts

Details Upper limits of narrow annihilation lines in gamma-ray bursts Upper limits of narrow annihilation lines in gamma-ray bursts

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aipc..101...59n&link_type=abstract

IN: Positron-electron pairs in astrophysics; Proceedings of the Workshop, Greenbelt, MD, January 6-8, 1983 (A85-31276 13-90). Ne

Astronomy and Astrophysics

Astrophysics

5

Gamma Ray Bursts, Positron Annihilation, Neutron Stars, Solar Maximum Mission, Spectrum Analysis, Temporal Distribution

Scientific paper

The SMM gamma-ray experiment has observed 60 gamma-ray bursts from March 1980 to August 1982. Details of one burst are illustrated. There is weak evidence for a broadened spectral feature early in the burst, which was also detected by the Konus experiment. The present detailed search is limitd to narrow lines (less than 70 keV FWHM) near 500 keV; none is found in any of the bursts. This absence contrasts with the reported detection of several broader features (Mazets et al., 1981). The implications for the physical conditions in the annihilation region are discussed.

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