The Intensity Distribution for Gamma-Ray Bursts Observed with BATSE

Details The Intensity Distribution for Gamma-Ray Bursts Observed with BATSE The Intensity Distribution for Gamma-Ray Bursts Observed with BATSE

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...464..606p&link_type=abstract

Astrophysical Journal v.464, p.606

Astronomy and Astrophysics

Astronomy

43

Gamma Rays: Bursts, Cosmology: Observations

Scientific paper

The intensity distributions of gamma-ray bursts observed by BATSE from 1991 April 19 to 1994 September 19 are presented. For this data set, is 0.329 +/- 0.011, which is 15.5 σ away from the value of 0.5 expected for a homogeneous distribution. Standard cosmological model parameters are obtained by fitting the differentially binned peak flux distribution expressed in units of photons cm^-2^ s^-1^ in the energy range 50-300 keV. The value of z calculated for a peak flux of 1 photon cm^-2^ s^-1^ is 0.8 +/- 0.33. The procedures used to produce the peak flux data and C_p_/C_lim_ data are presented. The differences between the two representations of burst intensity are emphasized so that researchers can determine which type of data is most appropriate for their studies. The sky sensitivity correction as a function of intensity for the peak flux data is also described.

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