\begin{table}%t1
%\centering
\par
\caption{\label{log} X-ray observing log of Altair and observation time of filtered high resolution data.}
\begin{tabular}{lll}
\hline\hline
No. & Time & Obs. time (ks)\\\hline
Obs.01 (ID 0502360101) &17 Oct./18 Oct. 2007 & 61.4 \\
Obs.02 (ID 0502360201) &31 Oct./01 Nov. 2007 & 67.8 \\
\hline
\end{tabular}
\end{table}