Observation of an absorption feature in a gamma ray burst spectrum

Journal Article · Sat May 26 00:00:00 EDT 1984 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.34543· OSTI ID:6523281

Hueter, G J

A gamma ray burst was detected on March 25, 1978 by the High Energy X-ray and Low Energy Gamma Ray Experiment on HEAO-1. The burst spectrum shows an absorption feature at 55 +- 5 keV with an equivalent width of 13 +- 3 keV, confirming the observation of similar features by the KONUS experiment. The burst spectrum also is characterized by a hard component extending from ''0.25-6 MeV. This component can be interpreted in terms of a fireball model for gamma ray bursts, which places the distance to the source at 400-700 pc. The integrated fluence of the burst between 0.025 and 6 MeV is 1.5 x 10/sup -5/ ergs/cm/sup 2/. The burst source has been localized to within a degree of RA = 237.5/sup 0/ and Dec = 76.2/sup 0/.

• Research Organization: Center for Astrophysics and Space Sciences University of California at San Diego La Jolla, California, 92103
• OSTI ID: 6523281
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 115:1; ISSN APCPC
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ASTRONOMY
BREMSSTRAHLUNG
COSMIC GAMMA BURSTS
COSMIC RADIATION
DISTANCE
ELECTROMAGNETIC RADIATION
GAMMA SPECTRA
IONIZING RADIATIONS
MATHEMATICAL MODELS
NEUTRON STARS
PRIMARY COSMIC RADIATION
RADIATIONS
SPECTRA
STARS
SYNCHROTRON RADIATION