\begin{table}%t3
\caption{\label{groups.tab}Seven SSP groups used in our stellar population analysis. }
%\centering
\par
\begin{tabular}{lllll}
\hline\hline\noalign{\smallskip}
Models & SSPs   & Ages & Metallicities & Notes  \\
\hline
 {No. (1)} & {6 SSPs }  & {Y1 Y2; I2 I3; O3 O4 } & {Z2  } &  \\
       &               &{Y3 Y4; I2 I3; O3 O4  } & {Z2  } & { for VM }\\ 
\hline
No. (2) & 3 SSPs       & Y1; I2; O3          & Z2 & \\ 
       &              & Y3; I2; O3          & Z2  & for VM \\ 
\hline
No. (3) & 9 SSPs   & Y1 Y2 Y3; I2 I3 I4; O2 O3 O4 & Z2 &  \\
       & 8 SSPs   &    Y3 Y4; I2 I3 I4; O2 O3 O4 & Z2 & for VM \\ 
\hline
No. (4) & 12 SSPs & Y1 Y2 Y3 Y4; I1 I2 I3 I4; O1 O2 O3 O4 & Z2 & \\
       & 10 SSPs &       Y3 Y4; I1 I2 I3 I4; O1 O2 O3 O4 & Z2 &  for VM\\ 
\hline
No. (5) & 12 (6 $\times$ 2) SSPs  &  Y1 Y2; I2 I3; O3 O4  & Z2 Z1  & \\
       &                     &  Y3 Y4; I2 I3; O3 O4  & Z2 Z1  &  for VM\\ 
\hline
No. (6) & 12 (6 $\times$ 2) SSPs     & Y1  Y2; I2 I3; O3 O4  & Z2 Z3 & \\
       &                        &  Y3 Y4; I2 I3; O3 O4  & Z2 Z3 &  for VM\\ 
\hline
No. (7) & 18 (6 $\times$ 3) SSPs     & Y1 Y2; I2 I3; O3 O4  & Z1 Z2 Z3 & \\
       &                        & Y3 Y4; I2 I3; O3 O4  & Z1 Z2 Z3 &  for VM\\
\hline
No. (8) & 6 SSPs & Y1 Y2; I2 I3; O3 O4 & Z1 & \\
       &        & Y3 Y4; I2 I3; O3 O4 & Z1 & for VM \\
\hline
No. (9) & 6 SSPs & Y1 Y2; I2 I3; O3 O4 & Z3 & \\
       &        & Y3 Y4; I2 I3; O3 O4& Z3& for VM \\
\hline
\end{tabular}
\tablefoot{Please see Table~\ref{agez.tab} for the meanings of the symbols. ``VM'' refers to the model Vazdekis/Miles. Group No. (1) is our ``standard case''.}\vspace*{2mm}
\end{table}