Verification of the accuracy of the GALFIT magnitude measurements by comparison with the measurements from the Source Extractor software SExtractor. Left: Boxplots representing the distributions of the magnitudes measured with Galf it and the Auto and ISO magnitudes measured with SExtractor. In each boxplot, the middle line represents the median of the distribution. The box itself extends from the lower quartile to the upper quartile, covering the interquartile range. The points that fall outside the whiskers situated on each side of the box are considered extreme values. Right: Comparison between the magnitudes measured with Galf it (abscissa) and the ISO and Auto magnitudes (ordinates) from SExtractor. The grey dotted line is a one-to-one line. These two plots do not show systematic differences in the photometry of the foreground lens galaxies between the different measurements.