- Only part of the event data are used in order to have a more reasonable estimation of burst durations. Light curve cut to T < T0+100s due to background problem (there might be some weak emission out to T0+45 s, but due to the rapidly changing background, it is hard to tell whether that is real.) - Maybe short GRB with extended emission. - T100, T90, and T50 might be lower limits. # single-ish pulse GRB.