Fig. 9
Histogram of incidence of brightness in units of σ in Cube 13 of the WVFS. At a level of − 5σ there are still many pixels, indicating that the number of false positives at the + 5σ level is also likely to be relatively high. At a level of − 8σ there are no negative pixels, so above a clipping level of + 8σ no false detections are expected.
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