Impact of the SED on the photoionised gas. First panel: Comparison between the powerlaw SED (orange) and the NLSy1 one (blue), in units of photons, s⁻¹ keV⁻¹ (arbitrary normalisation). Second panel: Iron ionic fractional distribution for log(ξ) = 3, N_H = 5 ⋅ 10²³, v₀ = 0.1c and the two different SEDs (colour coding as above). Third and fourth panels: Absorption and emission spectra (thin and thick lines, respectively; units of Erg s⁻¹ keV⁻¹) assuming the powerlaw and the NLSy1 SED, respectively, and the same log(ξ),N_H, v₀ as in the second panel.