sample). The analysis of both groups is done in 5ms time bins. This sample is rather small and not randomly chosen, but this is the best sample one could get within the data limitation.

Results
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Attributes of long bursts pulses 
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We begin by estimating the duration, $ T $, and the shortest pulse duration, $ \delta t_{min} $, of the *‘long’* bursts. Fig. \[longs dt/T fig\] shows $ \delta t_{min}/T $ and $ \delta t_{min} $ as a function of $ T $. Fig. \[longs dt/T fig\]a shows that $ \delta t_{min} $ and $ T $ are not correlated[^1]. Consequently, $ \delta t_{min}/T $ is smaller for longer bursts. The value of $ \delta t_{min}/T $ for the longer bursts are $ 10^{-3}-10^{-2} $. The gray areas are restricted because of the resolution. $ \delta t_{min} $ is limited by the resolution, suggesting that the bursts are variable even on shorter time scales and therefore $ \delta t_{min}/T $ is even smaller. This suggestion is confirmed later when we discuss the high resolution data (see sec. \[long start result\]).

The effects of noise on the temporal structure\[noisy vs longs\]
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We turn now to the effect of 