High-energy gamma rays from the intense 1993 January 31 gamma-ray burst

Details High-energy gamma rays from the intense 1993 January 31 gamma-ray burst High-energy gamma rays from the intense 1993 January 31 gamma-ray burst

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...422l..63s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 422, no. 2, p. L63-L66

Astronomy and Astrophysics

Astronomy

117

Gamma Ray Bursts, High Energy Interactions, Particle Acceleration, Radio Sources (Astronomy), Gamma Ray Observatory, Light Curve, Maximum Likelihood Estimates, Power Spectra

Scientific paper

The intense gamma-ray burst of 1993 January 31 was detected by the Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Observatory. Sixteen gamma rays above 30 MeV were imaged in the telescope when only 0.04 gamma rays were expected by chance. Two of these gamma rays have energies of approximately 1 GeV, and the five bin spectrum of the 16 events is fitted by a power law of photon spectral index -2.0 +/- 0.4. The high-energy emission extends for at least 25 s. The most probable direction for this burst is determined from the directions of the 16 gamma rays observed by Egret and also by requiring the position to lie on annulus derived by the Interplanetary Network.

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