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Considering the shortage of comparative studies on pulse temporalcharacteristics between single-peaked short gamma-ray bursts (sGRBs) anddouble-peaked sGRBs, we examine the pulse properties of a sample of 100 BATSEsGRBs using the BATSE Time-Tagged Event (TTE) data with a 5-ms resolution. 243individual pulses of the single-peaked, double-peaked and triple-peaked sGRBsare fitted to get their statistical properties such as the pulse asymmetry,amplitude, peak time, and pulse width, etc. For the double-peaked sGRBs,according to the overlapping ratio between two adjacent peaks, we first definetwo kinds of double-peaked sGRBs as M-loose and M-tight types and find thatmost of the first pulses are similar to the single-peaked ones. We study thedependence of the Full Width at Half Maximum (FWHM) on the photon energy amongdifferent energy bands. Interestingly, it is found that a power-law relationwith an index of -0.4 does exist between the FWHM and the photon energy for thesingle- and double-peaked sGRBs. More interestingly, we notice that thepower-law relation with a positive index also exist for several special shortbursts. In view of the three typical timescales of pulses, namely the angularspreading timescale, the dynamic timescale, and the cooling timescale, wepropose that the diverse power-law indexes together with the profile evolutionof GRB pulse can be used as an effective probe to diagnose the structure andevolution of the relativistically jetted outflows.

Properties of Short GRB Pulses in the Fourth BATSE Catalog: Implications for Structure and Evolution of the Jetted Outflows