Data set of individual I_E magnitudes of GC candidates and fits to the GCLF. (a): photometry of objects within 2 R_e of the centres of 14 dwarf galaxies. (b): same data after sorting (green), compared with the sorted magnitudes of all the sources in background rings around dwarf galaxies (red). (c): map of posterior probabilities obtained when, for each (µ, σ)-pair, the value of β that maximises the posterior probability is retained. The white and black contours correspond, respectively, to an e-fold and a 10-fold decrease in probability compared to the best fit. (d): cumulative distributions of observed magnitudes together with the cumulative distribution of the best-fit model (black line).