Image stamps showing the Herschel/PACS maps of 2013 AZ₆₀ in the 70 μm (blue), 100 μm (green), and 160 μm (red) channels. Each stamp covers an area of 64′′×64′′, while the tick marks on the axes show the relative positions in pixels. The effective beam size (i.e. the circle with a diameter corresponding to the full width at half maximum) is also displayed in the lower left corners of the stamps. The upper panels show the stamps directly combined from the individual frames where the lower stamps are obtained using the double-differential method. Because of the failure of the red channel half and the astrometric uncertainties, the second visit is nearly unusable in red, hence double-differential maps cannot be created.