Distribution of the type 1 and 2 AGNs in the N_H − λ_sBHAR space. The horizontal dashed line at log N_H = 22 cm⁻² marks the region where dust lanes from the host galaxy are typically expected to contribute to the line-of-sight column density. The blue curve represents the effective Eddington ratio, assuming a dust abundance of 0.3 times the galactic value (Fabian et al. 2008). The blowout phase, i.e. the region in the N_H − λ_sBHAR space where radiation pressure pushes away the obscuring material, is shown by the shaded area. Typical uncertainties are ∼0.4 dex in N_H and ∼0.3 dex in λ_sBHAR (on logarithmic scale in both cases). These should be taken into account when interpreting whether individual points fall above or below the threshold.