Left panel: Relation between black hole mass (log₁₀ M_BH) and stellar velocity dispersion (log₁₀(σ_*/200 km s⁻¹)) for the early-type galaxies in our sample. Radio-dim sources are shown as blue diamonds and radio-bright sources as red circles and their corresponding regression lines plotted as solid lines with shaded areas indicating 95% credibility intervals. The black dashed line shows the regression obtained by Graham & Scott (2013) for their full sample of 77 galaxies. Right panel: Scatter of the radio-dim and radio-bright sources from the mean regression line obtained by Graham & Scott (2013) as a function of velocity dispersion. The projected histograms of the source distributions along both axes are presented with the same color scheme for the two radio sub-types.