X/[Ne V] vs. N_H diagram. Red dots are the X-ray-detected sources of the [Ne V] sample, with N_H obtained from the X-ray spectral analysis. The solid line shows the expected X/[Ne V] values as a function of absorption, as computed by Gilli et al. (2010, but see also Cleri et al. 2023) using spectral templates with different N_H, starting from the mean X/[Ne V] obtained from a sample of unobscured Seyfert galaxies. The cyan shaded region was computed in the same way, but starting from the mean X/[Ne V] ±1σ and the grey shaded region starting from the mean X/[Ne V] ±90%. The [Ne V] sample populates the obscured AGN region of the diagram, i.e., N_H ≳ 10²² cm⁻².