Fig. 1

Parametrization of the Hβ-[OIII] region of the WISSH QSO J0958+2827. The red line shows the best fit to the data. Green curve refers to the core component associated with the NLR emission of Hβ and [OIII] emission lines. The blue curve refers to the broad blueshifted emission of [OIII]λλ4959, 5007 Å, indicative of outflow (but see Sect. 3.1 for more details). Gold curve indicates the broad component of Hβ associated with BLR emission. FeII emission is marked in magenta.
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