\begin{table}%t5
\caption {Best fit parameters for analytical form of the mass-metallicity relation
in Eq.~(\ref{eq_mz_evol}) at different redshifts.
\label{tab_mz_evol}}
%\centerline
{
\begin{tabular}{ccc}
\hline\hline                 % inserts double horizontal lines
$z$ & $\log M_0$ & $K_0$ \\
\hline
0.07  &  11.18  & 9.04 \\
0.7  &  11.57   & 9.04 \\
2.2  &  12.38   & 8.99\\
3.5$^a$  &  12.76  & 8.79 \\
3.5$^b$  &  12.87  & 8.90 \\
\hline                  % inserts double horizontal lines
\end{tabular}
}
\par
\smallskip
Notes: $^a$ Value obtained by using the masses estimated with the
BC03 templates. $^b$ Value obtained by using the masses
estimated with the M05 templates.
\end{table}