Hardness Ratio and Spatial Distribution of Gamma-Ray Bursts

Details Hardness Ratio and Spatial Distribution of Gamma-Ray Bursts Hardness Ratio and Spatial Distribution of Gamma-Ray Bursts

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19312213p&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #122.13; Bulletin of the American Astronomical Society, Vol. 31, p.666

Astronomy and Astrophysics

Astronomy

Scientific paper

Gamma-Ray Bursts have been divided into groups according to their hardness ratio HR, namely the ratio of the 100 to 300 keV peak flux to the 50 to 100 keV one. Special care has been used to exclude events with large measurement errors. It is confirmed that the Log N - Log P curve of bursts with HR smaller than 1.5 shows no deviation from the -3/2 slope at low intensities. A small deviation from isotropy in the sky map appears both for the high and low HR groups, however with a small statistical significance. All data are taken from the BATSE catalog on-line, available at www.batse.msfc.nasa.gov/.

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