Differential continuum number counts computed from the A³COSMOS database in four ALMA bands (as labelled in the top left corner of each panel) for nine different radii of the mask around the phase centre of single pointings. Uncertainties are shown as vertical coloured lines in the respective bins. The dotted grey line shows the number counts using all data in the A³COSMOS database and applying no corrections. Error bars are not shown for the uncorrected number counts.