Morphological properties of Short Duration GRBs

Details Morphological properties of Short Duration GRBs Morphological properties of Short Duration GRBs

1999-03-17

arxiv.org/abs/astro-ph/9903256v2

Astronomy and Astrophysics

Astrophysics

This is a LATEX2e file with one figure in a ps file. This paper was presented in the Astronomical Society of India meeting hel

Scientific paper

In this paper, we study a sample of 65 short duration bursts contained in the 3B catalogue. We fit the time profiles of these GRBs with lognormal functions and study various temporal properties. In most of the multi-peaked bursts, our analysis leads to a statistical evidence for the evolution of temporal asymmetry in individual pulses i.e. subsequent pulses in a GRB, on an average, tend to be more symmetric. Using a peak asymmetry evolution parameter, we find that 90% of short duration GRBs with 3 or more peaks exhibit the above trend individually.

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