Fig. 3
Example SDSS spectra with low S/N (S/NHα ≈ 5−7) of several spectral types: a) Seyfert 2 (SDSS ObjId: 588007006326096041), b) LINER (ObjId: 587736783609069705), c) composite (ObjId: 587742061625606544), d) SF (ObjId: 587728677931778286), and e) Type 1 AGN (ObjId: 587727225695698974). Vertical dashed lines indicate the positions of emission lines used for the spectral classification.
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