\begin{table}%[ht]%T1
%\centering
\par
\caption{Observation log of the data of AT Mic.}\label{t1}
\begin{tabular}{lllllr}
\hline\hline
Instrument           &  Filter&Mode&Date-obs-start&Date-obs-end&Performed duration (s)\\
\hline
MOS1                 &  Medium&Small Window&2000-10-16T00:27:48&2000-10-16T07:34:02&25394\\
MOS2                 &  Medium&Timing      &2000-10-16T00:38:15&2000-10-16T07:34:29&24794\\
pn                   &  Medium&Small Window&2000-10-16T00:41:50&2000-10-16T07:41:13&25103\\
RGS1                 &  None  &Spec+Q      &2000-10-16T00:19:12&2000-10-16T08:11:48&28254\\
RGS2                 &  None  &Spec+Q      &2000-10-16T00:19:12&2000-10-16T08:11:48&28254\\
\hline
\end{tabular}
\end{table}