\begin{table}%t4
\caption{\label{tab:wfi}Summary of the \WFI\ optical observations performed by the ESO/MPG 2.2~m telescope.}
%\centering
\small
\begin{tabular}{l|crcc} 
\hline \hline
Date & Filter & Time (s) & Airmass  & Seeing \\ 
\hline 
10 Mar. 2005 & $R$ & 2888.75 & 1.09 & 0.99 \\ 
            & $I$ & 1999.73 & 1.15 & 1.09 \\ 
01 May 2005 & $V$ & 2559.09 & 1.11 & 0.52 \\  
02 May 2005 & $I$ &  269.42 & 1.10 & 0.69 \\ 
25 Feb. 2006 & $I$ & 1999.59 & 1.09 & 0.86  \\ 
25 Apr. 2006 & $B$ & 1999.59 & 1.09 & 0.68 \\ 
            & $U$ & 2499.59 & 1.11 & 0.61 \\
\hline 
\end{tabular}
\end{table}