**Table 7:** H $\beta$ corrections for gradients.
Galaxy	Aperture	EWO[III]	Quality	EWH $\alpha$
NGC 128	0	-0.317	1.000	-0.702
NGC 128	1	-0.204	1.000	-0.608
NGC128	2	-0.173	2.000	-0.434
NGC 128	3	0.119	0.000	-0.174
NGC 777	0	0.042	0.000	-0.124
NGC 777	1	0.057	0.000	-0.106
NGC 777	2	0.045	0.000	-0.168
NGC 777	3	0.162	0.000	-0.129
....	...	.....	.....	.....

The table provides in Col. 2 the gradient, ( $0=0 \leq r \leq r_{\rm e}$ /16, $1 = r_{\rm e}/16 \leq r \leq r_{\rm e}$ /8, $2 = r_{\rm e} /8 \leq r \leq r_{\rm e}$ /4 and $3 = r_{\rm e}/4 \leq r \leq r_{\rm e}$ /2), and the estimate of the EW of the O[III] and H $\alpha$ (Cols. 3 and 5 respectively) obtained from the subtraction of the template galaxy, NGC 1426. 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 in electronic form at the CDS.

Source LaTeX | All tables | In the text

	1 Introduction
	2 Characterization of the sample
	3 Observations and data-reduction
	4 Measurements of line-strength indices and transformation to the Lick-IDS System
	5 Results
	6 Summary
	References
	Online Material
	Appendix A: Relevant notes on individual galaxies from the literature