Fractal analysis of time profile of the gamma ray burst registered by BATSE

Details Fractal analysis of time profile of the gamma ray burst registered by BATSE Fractal analysis of time profile of the gamma ray burst registered by BATSE

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....7.2739k&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

GRB time profiles of 1300 GRB from 4B revised BATSE catalog were analyzed by fractal dimension method. Fractal index (dimension) D was determined for each GRB. GRB were divided into three groups in according with the T90 burst duration: short, middle and long. The fractal index distributions for these GRB sets are presented. Distribution shapes for short, middle and long GRB are not identical. Distributions for shot and middle bursts have at least two maximums each: at D=1.47±0.02 and 1.8±0.02 for shot duration and at D=1.17±0.02 and D=1.42±0.02 for middle duration of GRB. There is only one wide maximum at D=1.48±0.02 in long duration population. While the majority of analyzed GRB probably belong to one class with fractal indexes D≈1.5, there are two additional statistically reliable subclasses of the bursts: with D=1.8 for short bursts and with D=1.17 for middle bursts.

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