\begin{table}%t7
\caption{\label{tab:esoarchive}First-epoch observations taken from the ESO WFI archive.}
%\centering
\small
\begin{tabular}{c c c c}
\hline\hline
 Date & Filter & Exp (s) & N.imm. \\
\hline
 30/3/2000  &  $V$  &   30   & 2 \\
 30/3/2000  &  $V$  &  240   & 2 \\
\hline
\end{tabular}
\end{table}