Evidence for a long duration component in the prompt emission of short   Gamma-Ray Bursts detected with BeppoSAX
  A statistical study on the light curves of all the short Gamma-Ray Bursts detected with the Gamma Ray Burst Monitor (GRBM) aboard BeppoSAX is reported. Evidence for a very weak and long duration component associated with these events in the two 1 s counters of the GRBM (40-700 keV and >100 keV) is found. It starts a few tens of seconds before the burst and continues for about 30 s after the burst. The overall hardness of this component is comparable with that of the event itself. The detection of a signal before the onset time and the similar hardness are consistent with an interpretation of the long duration component in terms of prompt emission associated with short GRBs. 
Enrico Montanari (1,2), Filippo Frontera (1,3), Cristiano Guidorzi   (1,4), Massimo Rapisarda (5) ((1) Universita di Ferrara...