Pixel value distributions of the 16 μm to 500 μm maps, in μJy / beam for 16 and 24 μm and mJy / beam otherwise. We show the observed distribution in GOODS-South in red, and compare this reference to 100 simulated catalogs generated with different random realizations. The median of these 100 realizations is shown with a solid black line, while the range covered by the 16th and 84th percentiles is shaded in gray in the background. Each map is median-subtracted, and the pixel values displayed here are scaled using the hyperbolic arcsine function (see text). We show the location of the median of the map with a vertical solid black line, and the 3σ point-source detection limit with a vertical blue dotted line.