Characteristic properties of peaks in GRBs

Details Characteristic properties of peaks in GRBs Characteristic properties of peaks in GRBs

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..138..419q&link_type=abstract

Astronomy and Astrophysics Supplement, v.138, p.419-420

Astronomy and Astrophysics

Astrophysics

6

Gamma, Rays: Bursts, Methods: Data Analysis, Cosmology: Observations

Scientific paper

The brightest 200 GRBs with duration T90 > 2 s, selected from the BATSE 4B catalog, have been analysed, using a wavelet technique. The characteristics of statistically significant peaks including the rise time, fall time, FWHM, peak height, peak area, time intervals between peaks and the number of peaks per burst have been analysed. The results presented show that the distribution of the areas of the peaks is compatible with a lognormal distribution. The properties of the peaks before and after the strongest peak have also been compared, and we have analysed the similarities and differences between the pre-peak and post-peak sections of the burst. The overall properties of peaks in GRBs provide considerable constraints on models that attribute the variability to interactions with an external medium or to the activity of a central engine.

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