Light profiles of the 4 clusters (green lines) best fitted with the β-models (yellow lines) and the corresponding Sérsic models (blue lines). The cluster name is shown in the upper left corner of each panel, while in the lower right corner we plot the discrepancy between the two models quantified with the two criteria defined in Sect. 5.1. Since the number of free parameters and data points are equal in the case of the two models, ΔBICBS = BICBeta − BICSersic = ΔAICBS = AICBeta − AICSersic = Δχ2.
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