Spaxel-by-spaxel plot of the ratio between the H₂ 0–0 S(1) luminosity and the monochromatic continuum luminosity νL_ν at 17 μm (with L_ν spectral luminosity). The ratio increases with the projected distance from the AGN up to 30 pc, pointing at a stronger non-radiative excitation of H₂ in the outer parts of the ICND. The horizontal dashed line indicates the UV PDR limit from Guillard et al. (2012b) rescaled using the L_PAH7.7μm/L_17μm ratio of the PAH_7.7μm and the continuum at 17 μm (averaged over the ICND).