Relative residual distribution for a subset of the calibrators covering the G-band magnitude range [5, 18]. The first row of plots shows the BP results, while the bottom row shows RP. In each row, the first plot shows the distribution of relative residuals vs. AL coordinate in the range [10, 50] where most of the flux is observed. In the second plot, the same distribution is shown including only data from sources in the magnitude range [13, 17]. In these first two plots, the 2D histogram is normalised to the number of measurements in each column and the relative number of sources is shown by the colour bar. The red line shows the median value, while the orange dashed lines show the 15.865 and 84.134 percentiles. The following two plots show the robust width of the distribution of relative residuals defined as the difference between the 84.134 and 15.865 percentiles divided by two vs. G-band magnitude and G_BP − G_RP colour and AL coordinate for the entire magnitude range covered by this subset.