Progress in gamma ray burst astronomy

Details Progress in gamma ray burst astronomy Progress in gamma ray burst astronomy

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974csgr.conf...37c&link_type=abstract

In ESRO The Context and Status of Gamma Ray Astronomy p 37-45 (SEE N75-25813 16-93)

Astronomy and Astrophysics

Astronomy

Cosmic Rays, Explorer 41 Satellite, Gamma Rays, Radio Bursts, Apollo 16 Flight, Energy Spectra, Explorer 43 Satellite, Satellite Observation, Spectrum Analysis, Vela Satellites, X Ray Sources

Scientific paper

Spectral observations on nine of the eleven known cosmic gamma ray bursts detected from IMP-7 from late 1972 through 1973 are reported. All nine events were found to have average spectra ranging from 100 to 1100 keV. The hypothesis of a single greater than 100 keV average event spectrum for all gamma ray bursts (inferred from IMP-6 observations) was investigated. In addition to the mutual consistency of these 14 IMP events, all independently reported average event spectra fit the IMP-7 common spectrum. This observed lack of variability of the average event spectrum suggests that the production mechanism is tied to more rigidly fixed source parameters than most celestial or solar hard X-ray phenomena. Other characteristics of gamma ray bursts events, are discussed: a high-energy spectral tail with power-law index -2.5, a rising size spectrum from the earlier event rate, and a hint of clustering of event occurrence in time.

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