Table 5: H$\beta $ corrections for apertures.
Galaxy aperture EWO[III] Quality EWH$\alpha $
NGC 3607 0 -0.342 1.000 -0.651
NGC 3607 1 -0.291 1.000 -0.582
NGC 3607 2 -0.255 1.000 -0.505
NGC 3607 3 -0.246 1.000 -0.519
NGC 3607 4 -0.217 1.000 -0.529
NGC 3607 5 -0.139 0.000 -0.457
NGC 3607 6 -0.104 0.000 -0.271
NGC 3818 0 -0.173 0.000 -0.141
NGC 3818 1 -0.154 0.000 -0.142
NGC 3818 2 -0.182 0.000 -0.154
NGC 3818 3 -0.182 0.000 -0.162
NGC 3818 4 -0.227 1.000 -0.222
NGC 3818 5 -0.178 0.000 -0.235
NGC 3818 6 -0.140 0.000 -0.295
........ ..... ...... ...... .......
The table provides the object identification (Col. 1), the number of the aperture (Col. 2), the corresponding radius of which is given in Table 9, and the EW of H$\beta $ emission as derived from the O[III] and H$\alpha $ emissions (Cols. 3 and 5 respectively). Column 4 gives the quality of the measure, obtained as the ratio between the estimated emission ( $F_{\rm gal} - F_{\rm templ}$) and the variance of the spectrum in the O[III] wavelength region, $\sigma_\lambda$. When the emission is lower than the variance, the quality is set to 0. When the emission is between 1 and 2  $\sigma_\lambda$ or larger than 2  $\sigma_\lambda$, the quality is set to 1 and 2 respectively. The entire table is given is electronic form.

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