Nucleus flux fraction as a function of host galaxy stellar mass for all nucleated early-type galaxies. The moving average (violet) was calculated using a bin width of 2 dex, and moved in steps of 0.2 dex (based on log₁₀(f_nuc/f_total) instead). The shaded region denotes the 1σ uncertainty within the moving average bins. The dashed and dot-dashed black lines denote the relation from Neumayer et al. (2020; their Eq. (1)) and Georgiev et al. (2016; their early-type sample), respectively. The dotted and dot-dashed red lines denote the estimated detection limits based on BIC and visual inspection, respectively. The dotted grey lines denote constant nucleus stellar masses.