The duration VS intensity diagram for a subset of PHEBUS gamma-ray bursts

Details The duration VS intensity diagram for a subset of PHEBUS gamma-ray bursts The duration VS intensity diagram for a subset of PHEBUS gamma-ray bursts

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97...79l&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 1, p. 79, 80.

Astronomy and Astrophysics

Astronomy

12

Cosmology, Gamma Ray Bursts, Spaceborne Astronomy, Gamma Ray Astronomy, Gamma Ray Spectra, Power Spectra

Scientific paper

Of the nearly one hundred gamma-ray bursts detected by the PHEBUS instrument on board GRANAT, twenty show characteristics which are quite different from the others. These bursts are all short, with durations less than two seconds, are significantly harder, and have time profiles which can best be described as 'square pulses'. Like the ensemble of 'classical' events, these bursts have a mean V/Vmax of 0.37 indicating a deficit of weak bursts. Following a suggestion by Paczynski that a diagram of duration vs. intensity should provide evidence of a cosmologic origin for gamma-ray bursts, we present such a graph for this subset of GRB's.

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