Maps of χ² values obtained from the minimization procedure using maximum intensities and spatial separations. The best-fit solution, corresponding to P_th = 3.2 × 10⁶ K cm⁻³, G₀ = 42, and R_C = 0.032 pc, is marked by a red circle. Constraints on G₀ and R_C remain weak, with the χ² surface appearing relatively flat (bottom center panel), except for very small R_C values. For comparison, a model adopting literature values (P_th = 4 × 10⁶ K cm⁻³, G₀ = 100) is shown by a green circle in the G₀–P_th panel.