High-energy emission in gamma-ray bursts

Details High-energy emission in gamma-ray bursts High-energy emission in gamma-ray bursts

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...288l..37m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 288, Jan. 15, 1985, p. L37-L40. Sponsorship: Bundes

Astronomy and Astrophysics

Astrophysics

85

Astronomical Models, Gamma Ray Bursts, Stellar Magnetic Fields, Field Strength, Gamma Ray Spectra, Gamma Ray Spectrometers, Solar Maximum Mission

Scientific paper

Between February 1980 and August 1983 the Gamma-Ray Spectrometer on the Solar Maximum Mission Satellite (SMM) detected 72 events identified as being of cosmic origin. These events are an essentially unbiased subset of all gamma-ray bursts. The measured spectra of these events show that high energy (greater than 1 MeV) emission is a common and energetically important feature. There is no evidence for a general high-energy cut-off or a distribution of cut-offs below about 6 MeV. These observations imply a limit on the preferential beaming of high energy emission. This constraint, combined with the assumption of isotropic low energy emission, implies that the typical magnetic field strength at burst radiation sites is less than 1 x 10 to the 12th gauss.

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