\begin{table}%ta1
%\centering
\par
\caption{Log of the observations relative to the October 2000
pointing.}
\begin{tabular}{lcrrc}
\hline\hline
Obs. code & Tstart (UT) & \multicolumn{3}{c}{Exposure}   \\
                  & (dd-MM-yyyy hh:mm:ss) & MECS  & PDS  & name   \\
\hline
21226001   & 20-Oct.-2000 21:26:55  & 32~069 & 15~343  & A \\
212260011  & 21-Oct.-2000 21:19:43  & 37~971 & 18~538  & B \\ % (10~045) D
212260012  & 22-Oct.-2000 23:31:34  & 23~042 & 11~335  & C \\ % (10~046) E
212260013  & 23-Oct.-2000 15:58:56  & 39~498 & 18~938  & D \\ % (10~050) F
212260014  & 24-Oct.-2000 19:29:31  & 38~873 & 18~579  & E \\ % (10~051) G
212260015  & 25-Oct.-2000 23:16:11  & 41~851 & 19~834  & F \\ % (10~052) H
212260016  & 27-Oct.-2000 02:51:35  & 43~547 & 20~781  & G \\ % (10~054) I
\hline
\end{tabular}\vspace*{2mm}
\end{table}