Autocorrelation function of the total intensity burst out to time lags of 40 μs. At time lags ≲15 μs, there are six peaks with roughly equal spacing. The red lines show integer multiples of 2.3 μs, which is the time lag of the first peak. The last peak is at a lag of ≈14 μs, which corresponds to the time between component 1 and component 6 in Figure 2. The inset shows the ACF at small lags, and the red line indicates the maximum of the first peak.