\begin{table}%t1
\caption{Table of the observations reduced and analysed
 for this work in addition to those reported by \cite{Kayser05}. The
 different field names in~$\omega$~Cen are abbreviated by their
 location in the cluster (e.g om-\textit{e} corresponds to
 \textit{e}ast). The ending "rgb'' refers to red giant stars, "to'' to
 main-sequence turn-off stars, "ms'' correspondingly to upper
 main-sequence stars. The field of view of a~MXU~mask is 6$\farcm$8~$\times$ 6$\farcm$8.}\label{tab}  %\centering
\par
\begin{tabular}{clcccc}
\hline  \hline
 Date & Mask & $\alpha_{2000}$ & $\delta_{2000}$ & Exp. time (red) [s] & Exp. time (blue) [s]\\
 \hline
2002/05/10 & om-n-rgb & 13:26:46.7 & --47:18:43.3 & 1 $\times$ 120,\ 1 $\times$ 240 & 2 $\times$ 300 \\
2002/05/11 & om-e-rgb & 13:27:48.1 & --47:27:27.4 & 2 $\times$ 180 & 2 $\times$ 240 \\
2002/05/11 & om-s1-rgb & 13:26:57.4 & --47:37:43.1 & 2 $\times$ 180 & 2 $\times$ 240 \\
2002/05/11 & om-n-ms & 13:26:46.7 & --47:18:43.2 & 3 $\times$ 1080 & 3 $\times$ 1200 \\
2002/05/12 & om-s2-rgb & 13:26:57.3 & --47:43:42.9 & 2 $\times$ 180 & 2 $\times$ 240 \\
2002/05/12 & om-s2-ms & 13:26:57.3 & --47:43:40.0 & 3 $\times$ 960 & 3 $\times$ 1200 \\
2002/05/12 & om-s1-ms & 13:26:57.8 & --47:37:43.7 & 3 $\times$ 900 & 3 $\times$ 1200 \\
2002/05/12 & om-e-ms & 13:27:48.1 & --47:27:30.8 & 3 $\times$ 900 & 3 $\times$ 1200 \\
 \hline
2002/05/10 & M~55-to & 19:39:59.1 & --30:53:01.2 & 3 $\times$ 600  & 3 $\times$ 720 \\
2002/05/11 & M~55-rgb & 19:39:58.9 & --30:52:56.4 & 2 $\times$ 180 & 2 $\times$ 240 \\
2002/05/12 & M~55-ms & 19:39:58.9 & --30:52:59.0 &   2 $\times$ 900 & 2 $\times$ 900 \\
 \hline
\end{tabular}
\end{table}