Surface brightness radial profile of NGC 4371. The top panels show only the profile derived from ellipse fits to the S⁴G image. The bottom panels also show the profiles of the different model components obtained with BUDDA: bulge in red, disc in blue, bar in green, and central point source in violet. The profile corresponding to the total BUDDA model is in magenta. The horizontal dotted line shows the surface brightness level below which background noise becomes important. The panels on the right focus on the inner 90′′ (shaded area on the left panels). The outer exponential disc, as well as the bump caused by the bar, are clearly seen. We also point out the bump at a radius of 10′′, produced by the ring shown in Fig. 1, and a clearly exponential region that dominates the profile between the ring and the bar-dominated region, which appears to be an inner disc, given its exponential profile.