Multicomponent simultaneous best-fit results (red curves) for two X-ray/SDSS sources showing iron emission and double peaked [O III] profiles. Black profiles represent rest-frame SDSS spectra. Blue and magenta curves indicate the best-fit results for the [O III]-Hβ emission and for the Fe II lines, respectively. For visual inspection, the iron profile is added to the power-law continuum. The figure shows the deconvolution between Fe II and the reddest emission from [O III]. We labelled in the panels the MJD, the plate, and the fibre numbers, which uniquely identifies the SDSS spectra and FWHM required to fit the iron emission.