χ² maps for HIP 114948. The maps are created as two dimensional cuts through the χ² distribution in the parameter space searched with GRaTer without (top) and with (bottom) the spatial information included. The parameters not plotted are fixed to their best-fit value, respectively (Table 6). The correlations between the three most relevant parameters (γ, a_min, and R₀) are shown. The white cross denotes the position of the best-fit (lowest χ²). The dashed vertical line denotes the value of γ = 3.5 expected from a standard equilibrium collisional cascade.