\begin{table}%t10
\caption{\label{table9}Comparison with the literature.}
%\centerline
{
\begin{tabular}{lcrrr}
\hline\hline
\multicolumn{1}{c}{index}
&\multicolumn{1}{c}{$N_{\rm gal}$}
& \multicolumn{1}{c}{offset}
& \multicolumn{1}{c}{dispersion}
& \multicolumn{1}{c}{units}
 \\
 \hline
 & & G93 + Long98 & & \\
\hline
        H$\beta$       & 14 &   0.028 &   0.614 & \AA  \\
       Mg2       & 14 &  --0.012 &   0.021 & mag  \\
       Mgb       & 14 &  --0.136 &   0.375 &\AA   \\
    Fe5270       & 14 &   0.069 &   0.295 &\AA   \\
    Fe5335       & 14 &  --0.169 &   0.446 &\AA   \\
       Mg1       & 14 &  --0.013 &   0.021 & mag  \\
 \hline                                     
 & & Trager et~al. (1998) & & \\            
\hline
        H$\beta$       & 28 &   0.004 &   0.375 &\AA  \\
       Mg2       & 28 &  --0.016 &   0.026 &mag  \\
       Mgb       & 28 &  --0.203 &   0.447 &\AA   \\
    Fe5270       & 29 &  --0.094 &   0.506 &\AA   \\
    Fe5335       & 29 &  --0.241 &   0.504 &\AA   \\
       Mg1       & 28 &  --0.015 &   0.021 &mag  \\
     G4300       & 29 &  0.153  &   0.887 &\AA    \\
     Ca4227      & 29 &  0.527  &   0.797 &\AA    \\
 \hline
 & & Beuing et~al. (2002)& & \\
\hline
        H$\beta$       & 12 &  --0.043 &   0.273 &\AA  \\
       Mg2       & 12 &   0.015 &   0.024 &mag  \\
       Mgb       & 12 &   0.188 &   0.610 &\AA   \\
    Fe5270       & 12 &   0.277 &   0.603 &\AA   \\
    Fe5335       & 12 &   0.076 &   0.405 &\AA   \\
       Mg1       & 12 &   0.008 &   0.018 &mag  \\
 \hline                                     
 & & Denicol{\' o} et~al.(2005)& & \\                
\hline
      H$\beta$   & 15 &   0.574 &   1.291 &\AA\\ 
       Mg2       & 15 &   0.001 &   0.021 &mag  \\
       Mgb       & 15 &  --0.060 &   0.513 &\AA   \\
    Fe5270       & 15 &   0.117 &   0.455 &\AA   \\
    Fe5335       & 15 &  --0.052 &   0.333 &\AA   \\
       Mg1       & 15 &  --0.003 &   0.018 &mag  \\
    \hline                         
\end{tabular}}                             
\medskip
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. 
\end{table}