Grids of Schwarzschild dynamical models (round symbols) with different mass-to-light ratios and black hole masses. Contours are the levels. The thick contours are the 3σ levels. Both panels are for regularization parameter of Δ = 10, while the right hand panel shows smoothed Δχ² contours using the local non-parametric regression LOESS algorithm (Cleveland 1979; Cappellari et al. 2013b), with the local polynomial set to quadratic. The large red circle shows the model with the formal χ² minimum. The LOESS smoothed χ² contours indicate that no χ² minimum is reached within our grid when models are marginalized over all M/L ratios. The dashed (green) line indicates the values of M_BH for which the sphere of influence is three times smaller than the resolution of our NIFS data (this value is also close to the prediction based on the McConnell & Ma (2013)M_BH−σ_e scaling relation). The dashed-double dotted (orange), long-dashed (blue) and dashed-dotted (red) vertical lines indicate predictions for M_BH of the van den Bosch (2016), Saglia et al. (2016) and Greene et al. (2016) scaling relation (for all galaxies in their samples), respectively.