\begin{table}%t1
\caption{Velocity dispersion and line-strength gradients for the sample of 82~galaxies. A~portion of the table is shown for guidance regarding its form and
content. For each galaxy and index, the first~line shows the measured gradient,
while the second row lists its corresponding formal error. The full table is
available in electronic form at {\tt http://www.edpsciences.org}.}\label{gradientes.electronic}
%\centering
\small
\begin{tabular}{@{}lrrrrrrrrrr@{}}
\hline\hline
Galaxy  & 
\multicolumn{1}{c}{$\sigma$}    & 
\multicolumn{1}{c}{D4000}       &
\multicolumn{1}{c}{H$\delta_{\rm A}$} &
\multicolumn{1}{c}{H$\delta_{\rm F}$} &
\multicolumn{1}{c}{CN$_2$}      &
\multicolumn{1}{c}{Ca4227}      & 
\multicolumn{1}{c}{G4300}       &
\multicolumn{1}{c}{H$\gamma_{\rm A}$} &
\multicolumn{1}{c}{H$\gamma_{\rm F}$} &
\multicolumn{1}{r@{}}{Fe4383}      \\
\hline
NGC 221 &$-0.0877$  &$-0.0520$&$-0.0014$  &$0.0008$   &$-0.0247$&$-0.0110$&$0.0104$&$0.0018$   &$0.0079$   &$0.0025$\\
        &$ 0.0126$  &$ 0.0058$&$ 0.0023$  &$0.0026$   &$ 0.0057$&$ 0.0035$&$0.0025$&$0.0020$   &$0.0032$   &$0.0017$\\
%        &           &         &          &            &         &         &        &           &          &         \\
        & 
\multicolumn{1}{c}{Ca4455}     &
\multicolumn{1}{c}{Fe4531}     &  
\multicolumn{1}{c}{C4668}      &  
\multicolumn{1}{c}{H$\beta$}   &  
\multicolumn{1}{c}{Fe5015}     &  
\multicolumn{1}{c}{Mg$_1$}     & 
\multicolumn{1}{c}{Mg$_2$}     & 
\multicolumn{1}{c}{Mgb}        & 
\multicolumn{1}{c}{Fe5270}     &  
\multicolumn{1}{r@{}}{Fe5335}     \\ 
\cline{2-11}
        &$0.0027$   &$-0.0030$&$-0.0037$  &$-0.0021$  &$0.0052$ &$-0.0007$&$0.0092$&$ -0.0017$ &$ -0.0038$ &$  0.0020$\\
        &$0.0019$   &$ 0.0016$&$ 0.0017$  &$ 0.0016$&$0.0019$&$ 0.0011$&$  0.0022$&$  0.0018$&$  0.0011$&$  0.0017$\\
\hline
\end{tabular}
\end{table}