the new *’noisy’* sample is comparable to the S/N ratio of the *’short’* sample.

We use the *’noisy long’* sample to investigate the influence of the noise on the analyzed temporal properties. We do so by comparing the temporal properties of the *’long’* sample with the temporal properties of the *’noisy long’* **sample.** In this way we can estimate what was the original temporal structure of the *’short’* sample.

\[longs start\]High-resolution long bursts 
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The comparison between the shortest time scales in long and short bursts requires the analysis of high-resolution long bursts. The only data with high enough resolution is the TTE data, which is available only for the first 1-2sec of the bursts. We have searched for long bursts that begin with a bright pulse during the first two seconds, also demanding that the counts would drop back to the background level during this time. This way the beginning of the light curve is not be dominated by a pulse longer then 2sec. We found 15 such bursts which we denoted as the *’high res long’* sample. We compared the first 1-2sec of these bursts with 15 short bursts with comparable peak fluxes (taken out of the *’short’* 