Observations of cosmic gamma-ray bursts

Details Observations of cosmic gamma-ray bursts Observations of cosmic gamma-ray bursts

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..42....3k&link_type=abstract

(COSPAR, Symposium on Fast Transients in X- and Gamma-Rays, Varna, Bulgaria, May 29-31, 1975.) Astrophysics and Space Science, v

Astronomy and Astrophysics

Astronomy

26

Cosmic X Rays, Gamma Rays, Radiant Flux Density, Vela Satellites, X Ray Astronomy, Apollo 16 Flight, Bursts, Radiation Detectors, Spaceborne Astronomy, Spectral Energy Distribution, X Ray Density Measurement, X Ray Spectra

Scientific paper

The occasional occurrence of brief but intense bursts of cosmic gamma-rays was revealed in data acquired from the Vela satellites. Confirmation of the nature of the events and additional detail of their characteristics has subsequently been provided by other groups of experimenters. Thirty-nine such events have been identified from data spanning a period of four and a half years. The record of intensity as a function of time varies considerably for different events, with total durations ranging from 0.1 to about 60 s. Time-integrated flux density ranges from about ten to the minus sixth to ten to the minus third erg/sq cm. Spectral measurements show a broad maximum in the energy distribution at about 150 keV. The distribution of source directions implies either near galactic or extragalactic locations. The existing data are not sufficient to distinguish between the various models proposed to explain the phenomenon; no model is completely consistent with all observed characteristics.

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