NBURSTS fitting results for SDSS spectrum J1448+16 using X-Shooter SSP models and Gaussian BLR profiles. Upper ticks correspond to rest-frame wavelengths, while the middle and bottom ticks correspond to observed wavelengths. Top panel: Full wavelength range of the SDSS spectrum; Bottom panels: Zoom-in on the surrounding ranges of two emission lines Hβ and Hα. In all panels: the black line corresponds to spectrum fluxes; the red line to the best-fit model; the purple line to the stellar population model including multiplicative continuum (stellar component); the light pink line to the additive continuum component describing the AGN continuum; the light blue and green lines to emission lines templates for NLR and BLR, respectively; the dark gray line to the data-model residuals; the colored shaded regions to the filter transmission curves of SDSS g′ in light orange and narrow Hα in light purple; and, finally, the light gray shaded bands to masked and excluded regions from the fit.