\begin{table}%t1
\caption{Log of X-ray and optical observations.} 
\label{table:1}                        
\par
%\centering
\small
\begin{tabular}{lllll}       
\hline\hline
Date         &  Instrument  & Total duration & Sampl. time\\
 (Y/M/D)      &              & [ks]         & [s]\\
\hline
28/06/2004   &  XMM-PN      & 29.4           &\\
             &  XMM-MOS1    & 31.6           &\\
             &  XMM-MOS2    & 31.6           &\\
             &  XMM OM-UVW1 & 0.8            &\\
             &  XMM OM-UVM2 & 1.3            &\\
             &  XMM OM-UVW2 & 1.4            &\\
\hline
14/02/2007   &  CAHA 2.2 m CAFOS   & 8.7      & 440\\
19/03/2007   &  CAHA 2.2 m (R)     & 14       & 45\\
\hline
\end{tabular}
\end{table}