Determination of the best fit to the nuclear spectrum of NGC 5427 (model A) for M_BH = 5 × 10⁷ M_⊙, an Eddington fraction of 0.1 and a hard X-ray scale factor of 0.2. The left panela) shows the rms error (in logarithmic space for 13 emission lines, while the right panel b) compares the He ii λ4686/He iλ5876 ratio and the He iλ5876/Hβ ratio with the observed ratios. It is evident that the best fit in this case is obtained at log U ~ −1.3. The line fluxes of this fit are given in detail in Table 2.