Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.2906p&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #29.06; Bulletin of the American Astronomical Society, Vol. 31, p.1413
Astronomy and Astrophysics
Astronomy
Scientific paper
The BATSE/CGRO Gamma-Ray Burst on-line catalog, available at http://cossc.gsfc.nasa.gov/cossc/batse/ , has been used in order to divide the events into different groups according to their duration and/or Hardness Ratio, defined as the 100-300 keV burst fluence divided by the 50-100 keV one. Log N - Log P curves show short, hard bursts as an homogeneous group. The long, softest bursts have a Log N - Log P curve consistent with a -3/2 slope. Slight anisotropies in the galactic distribution of the hardest and softest bursts are attributed to selection effects in burst detection. Funding for this work is provided by TESRE/CNR.
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