Open AccessThe relationship between FWHM and duration of single peaked GRB light curves
Author(s) -
Deng Jia-Gan,
Ren-Tang Huang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.1285
Subject(s) - gamma ray burst , logarithm , full width at half maximum , light curve , physics , fluence , astrophysics , correlation coefficient , duration (music) , statistics , optics , mathematics , mathematical analysis , laser , acoustics
We explored the relation between FWHMs of single pulses in a sample of GRB (Gamma-Ray Burst) light curves and durations of the GRBs. Based on a sample of 108 single_peaked GRB light curves, we fitted these sample data with Kocevski, Ryde & Liang (2003) model. A sub-sample containing 59 pulses with χ2T≈BWa, where T is the duration, W is the FWHM a and B are constants. Our result shows that there does exist a proportional correlation between the logarithm of FWHMs and the logarithm of T90 (duration containing from 5% to 95% of the total fluence of a GRB) of GRB light curves with a correlation coefficient R=072.The proportional correlation between the logarithm of FWHMs and the logarithm of T50 (duration containing from 25% to 75% of the total fluence of a GRB) is more tight with a larger correlation coefficient R=093.Our finding shows that the light curve structure is correlated to the GRB duration. A larger FWHM corresponds to a longer GRB.