Observational differences between Swift GRB classes

Details Observational differences between Swift GRB classes Observational differences between Swift GRB classes

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1358..231b&link_type=abstract

GAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 231-234 (2011).

Statistics

Spectral Analysis, Gamma-Rays, Photons, Statistical Analysis, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Gamma-Ray, Photons, Multivariate Analysis

Scientific paper

There are accumulating evidences that GRBs have an intermediate group, beside the short and long classes. Based on the observational data available in the Swift table we compared the observational γ and X ray properties of GRBs making use the discriminant analysis of the multivariate mathematical statistics. The analysis resulted in two canonical discriminating functions giving the maximum separation between the groups. The first discriminating function is dominated by the γ and X-ray fluence while the second one is almost identical with the photon index.

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