Logarithm of the ratio of integrated to peak flux density plotted against the signal-to-noise ratio as measured by the source finder. A perfect point source would have ln(S_I/S_P) = 0 (blue dashed line). In the top panel we show all isolated sources present in the catalogue. The bottom panel is restricted to those sources whose cross-match is an isolated point source in LoTSS (see text). Red crosses show the binned median with the extension on the x-axis showing the bin size and on the y-axis showing ±1 median absolute deviation. Orange markers show the position of the 99th percentile of the distribution in each bin. Dotted orange line is a fit to the orange markers positions as explained in the text.