\begin{table}%T1
\caption{\label{obslog}Observing log of X-ray observations.}
\small%\centering
\par
\begin{tabular}{lllr}
\hline \hline\noalign{\smallskip}
Observatory & ObsID  & Obs. date & Exp. time \\
\hline
{\it XMM-Newton} & 0303900301 & 2005-08-08 & 30 ks\\
{\it XMM-Newton} & 0303900401 & 2005-08-17 & 27 ks\\
{\it XMM-Newton} & 0303900501 & 2005-09-06 & 27 ks\\
{\it Chandra} & 9938 & 2009-05-04 & 150 ks\\
\hline
\end{tabular} 
\end{table}