Left panel: particulars of a point source as reconstructed by the ROMAGAL map-making for PACS at 70 μm; the typical cross feature introduced by the GLS map-maker when performing the noise filter deconvolution in Fourier space over strongly varying signal (as is the case for point-like sources) is clearly seen (image in log scale). The minimum within the negative cross scales as ~ 2.5% of the peak source flux. Right panel: same as left panel with the same scale and colour stretch, but after applying the correction devised by Piazzo et al. (2012). The angular extent of the region imaged is ~6′× 4′.
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