Synthetic rotational diagrams based on the H₂ intensities predicted for different combinations of parameters in the Kristensen et al. (2023) shock models. Green triangles show model results for n_H = 10³ cm⁻³, G₀ = 100, v_sh = 15 km s⁻¹, b = 0.1, ζ = 10⁻¹⁷ s⁻¹, and X(PAH) = 10⁻⁷. Orange diamonds show the model with n_H = 10⁴ cm⁻³, G₀ = 100, v_sh = 15 km s⁻¹, b = 1, ζ = 10⁻¹⁷ s⁻¹, and X(PAH) = 10⁻⁷. Blue points correspond to the observed values for aperture A of WL 17. Solid lines represent the best fit in each case.