\begin{table}%t1
      \caption{Summary of the {\em XMM-Newton} observation of UU~Col.}
         \label{obslog}
    \small %\centering
\par
\begin{tabular}{l  c c r c }
            \hline \hline
            \noalign{\smallskip}
Instrument     &  Date & UT(start) & Duration (s) & Net count rate 
(cts~s$^{-1}$)\\
               \hline
    EPIC PN &  2004 Aug. 21 & 22:00 & 26~037 & 0.50\\
 EPIC MOS & & 21:38 & 27~666 & 0.18 \\
 RGS    & & 21:37 & 27~918 & 0.018  \\
 OM B & & 21:46 & 2441 & 3.10\\
      & & 22:32 & 2441 & \\
      & & 23:18 & 2440 & \\
      & 2004 Aug. 22 & 00:04 & 2440 & \\
      & & 00:50 & 2439 & \\
 OM UVM2 & & 01:36  & 2439 & 0.47 \\
         & & 02:22 & 2440 & \\
         & & 03:08 & 2440 & \\
         & & 03:54 & 2439 & \\
         & & 4:40 & 2439  & \\
              \hline
\end{tabular}
\end{table}