Results of the specfit analysis on the spectra of Pop. A sources in the HE sample, in the Civ and Hβ  spectral range (adjacent left and right panels), after continuum subtraction. Horizontal scale is rest frame wavelength in Å or radial velocity shift from Civ rest wavelength (left) or Hβ  (right) marked by dot dashed lines; vertical scale is specific flux in units of 10^-15 erg s^-1 cm^-2 Å^-1. The panels show the emission line components used in the fit: Feii emission (green), BC (thick black), and BLUE (thick blue), narrow lines (orange). The Oiii]λ1663 line at ≈1660 Å is shown in gray. Thin blue and black lines trace the BLUE and BC for Heiiλ1640. The lower panels show (observed – specfit model) residuals.