\begin{table}%t1
%\centering
\par
\caption{\label{expdates}Summary of the WFI, MOSCA and FORS1 observations.}
\begin{tabular}{l l l l }
\hline
\hline
Instrument & Exp. time [s] & Seeing & Observation\\
 & (number of exp.) & [$^{\prime\prime}$] & dates\\ 
\hline
\noalign{\smallskip}
MOSCA & 20~700 (23) & 1\myarcsec0 & 2006-12-20\\
WFI & 23~520 (36) & 1\myarcsec1 & 2000-11-06/07\\
 & & & 2002-02-02/05/06\\
\hline
\end{tabular}
\end{table}