The peak flux distribution of bright gamma-ray bursts measured with ULYSSES

Details The peak flux distribution of bright gamma-ray bursts measured with ULYSSES The peak flux distribution of bright gamma-ray bursts measured with ULYSSES

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..138..421a&link_type=abstract

Astronomy and Astrophysics Supplement, v.138, p.421-422

Astronomy and Astrophysics

Astrophysics

4

Gamma-Rays: Bursts

Scientific paper

Observations of gamma-ray burst afterglows have shown that these events come from formidable explosions at cosmological distances. If the most distant GRBs seen by BATSE have redshifts of the order of 3-6 (e.g. GB 971214), it is a coincidence that the bright end of the GRB intensity distribution displays the -3/2 slope expected for a Euclidean distribution of sources. We analyze nearly 10 years of continuous observation of bright GRBs with {ULYSSES}, in order to constrain their intensity distribution. This extensive dataset (more than 200 bursts in the ``Euclidean'' part of the curve) is used to quantify the agreement of the data with the canonical slope of -3/2.

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