Spectrum of NGC 2347 nucleus (black), together with the best STARLIGHT fit (red) and the pure nebular emission line spectrum (the difference, in blue). Note that the original spectrum is less noisy below 4500 Å, where the original V1200 spectrum has been degraded to the V500 resolution (6 Å). Gray shadows are the wavelength ranges masked in the stellar population fit. Orange lines correspond the positions of the fitted emission lines. The region around Hβ and [O iii] λ4959 is zoomed in the inset to show that the emission lines are clearly seen only in the difference spectrum. Note also that the [N ii] λ6583 line in the observed spectrum is higher than Hα, but it is lower in the continuum-subtracted spectrum.