Fig. 6
Top panel: comparison between the EW(Hα + [NII]) measured on the Hα images from this work in 3 arcsec apertures and the EW(Hα + [NII]) measured on SDSS spectra taken in 3 arcsec fibres. Bottom panel: comparison between the (Hα + [NII]) flux measured on the Hα images from this work in 3 arcsec apertures and the (Hα + [NII]) flux measured on SDSS spectra taken in 3 arcsec fibres. The dashed lines give the 1:1 relation.
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