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Fig. B.1.

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Normalized histograms of the S/N values for the pixels within the effective area of the 850 and 450 μm maps. The light and dark gray histograms indicate the distributions of the jackknife maps and of the data, respectively. The data, especially at 850 μm, show excesses at high S/N where sources contribute to the distribution. The dashed vertical line represents the cut used in the simulations of the number counts (see Table 2). The dotted line represents the threshold (4σ) above which we catalog sources.

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