Intrinsic AGN over host galaxy contrast at rest-frame 5100 Å versus the optical extinction. To represent E(B − V) = 0 values in a logarithmic axis they have been approximated as E(B − V) = 0.005. Large stars corresponds the mean points of groups 1.0–5 (blue, ⟨log₁₀(L_AGN/L_GAL)⟩ = 0.87 ± 0.11) and 1.8–2 (maroon, ⟨log₁₀(L_AGN/L_GAL)⟩ = −0.41 ± 0.08) both with extinctions under E(B − V) = 0.65. Symbol and colour code as in Fig. 1, except for AGN with E(B − V) compatible with no obscuration, that have been represented with empty triangles pointing down.