\begin{table}%t1
%\centering
\par
\caption{The observations analyzed in this work.}\label{tab:obslog}
\small \begin{tabular}{l l r}
 \hline \hline 
Date (dd/mm/yyyy)  & Telescope/Instrument     & Duration\\
  \hline  
28/03/2005         & AIP 70~cm/R               & 5.0~h\\
30/03/2005         & AIP 70~cm/R               & 8.6~h\\
20/04/2005         & AIP 70~cm/R               & 4.7~h\\
31/05/2005         & AIP 70~cm/R               & 7.6~h\\
31/05/2005         & XMM / PN+MOS+OM            & 12.5~h\\
%\noalign{\smallskip} \hline \noalign{\smallskip}
06/04/2006         & XMM / PN+MOS+OM            & 10.6~h\\
08/05/2006         & AIP 70~cm/R               & 4.4~h\\
 \hline
\end{tabular}
\end{table}