Best fit of the intrinsic luminosities of the UV narrow emission lines (middle panel). The model is displayed by a solid line only to guide the eye. The line luminosities predicted by the model in the X-ray (left panel) and in the optical (right panel) band are displayed by red crosses connected by a solid line. The model agrees with the upper limits for the X-ray lines but does not fit the optical lines. The qualitative best fit model for the X-ray lines is also shown by red crosses connected by a dot dashed line. Error bars, when larger than the size of the plotting symbols, are also shown. Note that a 3σ error bar is shown for O vii-f line.