Number density of the compact sources as function of the cluster-centric distance. The number density (left axis) of the dwarf galaxy population (red line) is taken from (La Marca et al. 2022a). The GC-specific frequency (black line, right axis) was derived in this work and is described in Sect. 5.3. The vertical dashed blue line marks the outer edge of the stellar envelope around the core, i.e. R_lim ∼ 15 arcmin ∼223 kpc (see Fig. 2).