\begin{table}%t9
%\centering
\par
\caption{Values of $t_{20}$ (black circle) and $t_{50}$ (grey circle) obtained for the 17~galaxies in the H$\delta_{\rm A}$-D4000 diagram, to quantify the probability of two successive starbursts (see text).\label{TAB:intbHd}}
\begin{tabular}{l|l|l}
\hline
\hline
id      &$t_{20}$       &$t_{50}$         \\
        &$10^8~\rm years$  &$10^8~\rm years$  \\
(1)&(2)&(3)\\
\hline
       7.udsf & 6.0  & 11.0 \\
      16.udsf & 10.0 & 14.0 \\
      17.udsf & 3.0  &  5.0 \\
      18.udsf & 7.0  & 12.0 \\
      19.udsf & 8.0  & 13.0 \\
      31.udsf & 6.0  & 11.0 \\
      \hline		      
       8.udsr & 6.0  & 12.0 \\
      10.udsr & 3.0  &  7.0 \\
      14.udsr & 7.0  & 12.0 \\
      20.udsr & 5.0  & 11.0 \\
      23.udsr & 7.0  & 12.0 \\
      \hline 		      
      2.cfrs  & 6.0  & 12.0 \\
       6.cfrs & 8.0  & 13.0 \\
       8.cfrs & 6.0  & 12.0 \\
      10.cfrs & 5.0  & 10.0 \\
      11.cfrs & 8.0  & 14.0 \\
      14.cfrs & 3.0  &  9.0 \\
\hline
\end{tabular}
\end{table}