Fig. 6.
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Mean FeII emission averaged over all 32 observations (red) as fitted by all six components. The black line represents the contribution from the multiplet 63 and the remaining part is almost entirely due to the I Zw 1 component (see KDP15), for FWHM of 4200 km s−1, and no shift with respect to the systemic redshift. FeII flux density is in units of erg s−1 cm−2 Å−1.
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