Observations of cosmic gamma-ray bursts with IMP-7 - Evidence for a single spectrum

Details Observations of cosmic gamma-ray bursts with IMP-7 - Evidence for a single spectrum Observations of cosmic gamma-ray bursts with IMP-7 - Evidence for a single spectrum

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...196l..43c&link_type=abstract

Astrophysical Journal, vol. 196, Feb. 15, 1975, pt. 2, p. L43-L46.

Astronomy and Astrophysics

Astrophysics

50

Cosmic Rays, Energy Spectra, Gamma Rays, Satellite Observation, Spectrum Analysis, Imp, Radiation Counters, Solar X-Rays

Scientific paper

Spectral observations of nine recent cosmic gamma-ray bursts are reported. The average photon number spectra of all nine events are each consistent with a 150-keV exponential from 100 keV to about 400 keV, and a power law of index -2.5 from 400 keV to 1100 keV. The observations also indicate an event rate of 16 in 1972 and 1973, or 8 plus or minus 2 per year, higher than the 5 plus or minus 1 per year initially reported. This corresponds to an approximately 40 percent lower effective intensity threshold, attained by using more sensitive detectors in multiple-satellite coincidence.

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