Average spectra for images A (in black) and B (in blue), focusing on the regions around the C III] emission line and the Fe III λλ2039−2113 emission feature. The continuum has been subtracted, and the spectra normalized to the core of the C III] line. Vertical dotted blue lines mark the wavelengths of the Fe III lines as per the Vestergaard & Wilkes (2001) template. Dashed red and orange curves represent fits to the Fe III λλ2039−2113 blend in images A and B, respectively, shifted by approximately ∼8 Å and ∼12 Å to match the template rest-frame. The ordinate is in arbitrary flux units.