Average satellite count within R_200c vs. halo mass for different simulations and redshifts as resulting from maximising the likelihood in Eq. (5). Left panel: satellite count vs. halo mass relation for simulations Box1a/mr C8 (dashed lines) and C15(dotted lines) at three different redshifts (the redder the higher the redshift). Right panel: each line represents a simulation at z = 0, colour coded with green with increasing Ω_m; line thickness covers the Gaussian scatter (Poissonian scatter is omitted).