Example of a continuum image that fails validation (as indicated by the red x); beam 27 of ObsID 191123047. The four panels shown are: upper left: continuum image; upper right: residual image (note the uncleaned source emission); lower left: flux density histogram of all pixels in the residual image (blue) compared to a Gaussian distribution (black) corresponding to σ_out; lower right: statistics calculated for the beam. These include the metrics in Sect. 4.1, in addition to other stasitics not (curtently) used in the validation. The first five are: σ_in, σ_out, the peak in the continuum image, the restoring beam, and R. The next two are Ex−2 and Ex+2. The dynamic range (D) is calculated as the peak of the continuum image divided by Neg10 × σ_out. The final two statiatics are Neg10 and Pos10.