Table 10: Comparison with the literature.
index $N_{\rm gal}$ offset dispersion units
    G93 + Long98    
H$\beta $ 14 0.028 0.614 Å
Mg2 14 -0.012 0.021 mag
Mgb 14 -0.136 0.375 Å
Fe5270 14 0.069 0.295 Å
Fe5335 14 -0.169 0.446 Å
Mg1 14 -0.013 0.021 mag
    Trager et al. (1998)    
H$\beta $ 28 0.004 0.375 Å
Mg2 28 -0.016 0.026 mag
Mgb 28 -0.203 0.447 Å
Fe5270 29 -0.094 0.506 Å
Fe5335 29 -0.241 0.504 Å
Mg1 28 -0.015 0.021 mag
G4300 29 0.153 0.887 Å
Ca4227 29 0.527 0.797 Å
    Beuing et al. (2002)    
H$\beta $ 12 -0.043 0.273 Å
Mg2 12 0.015 0.024 mag
Mgb 12 0.188 0.610 Å
Fe5270 12 0.277 0.603 Å
Fe5335 12 0.076 0.405 Å
Mg1 12 0.008 0.018 mag
    Denicoló et al.(2005)    
H$\beta $ 15 0.574 1.291 Å
Mg2 15 0.001 0.021 mag
Mgb 15 -0.060 0.513 Å
Fe5270 15 0.117 0.455 Å
Fe5335 15 -0.052 0.333 Å
Mg1 15 -0.003 0.018 mag
Offsets and dispersions of the residuals between our data and the literature. Dispersions are 1$\sigma $ scatter of the residuals. Beuing et al. (2002) do not compute G4300 and Ca4227 indices. For G4300 and Ca4227 indices Gonzalez (1993) and Longhetti et al. (1998) used a (slightly) different definition than Trager et al. (1998) and consequently comparisons are not reported in the table. The comparison for H$\beta $ index between our data and those of Trager et al. (1998) and Beuing et al. (2002) are made using uncorrected data.

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