\begin{table}%t1
%\centering
\par
\caption{\label{filtres}The filters used in the photometric campaigns with the WFI.}
\begin{tabular}{c c}
\hline\hline\noalign{\smallskip}
Filter & ESO number \\
\hline\noalign{\smallskip}
$U$ & BB\#U/50\_ESO877 \\
$B$ & BB\#B/123\_ESO878 \\
$V$ & BB\#V/89\_ESO843 \\
$R_{\rm c}$ & BB\#Rc/162\_ESO844 \\
$I_{\rm c}$ & BB\#I/203\_ESO879 \\
H$\alpha$ & NB\#Halpha/7\_ESO856 \\
\hline
\end{tabular}
\end{table}