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This article has an erratum: [https://doi.org/10.1051/0004-6361/201117810e]


Fig. 2

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Probability density distribution of time differences between pulses for noise (bold line) and the exponential expectation for a Poissonian process fitted in the range 15 ms  < ΔT <  50 ms (thin line). The excess is due to bursts of correlated hits, as can be seen from the 50 ms long snapshot of hit times shown in the insert.

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