\begin{table}%t2
\caption{Summary of the {\it XMM-Newton} observations used in this paper.\label{table:obs_xmm}}
%\centering
\par
\begin{tabular}{cccc}
\hline\hline
Obs-Id & Instrument & Time & Time after \\
 &  &  &  flare screening\\
\hline 
0112970201 & M1 & 17.2 ks & 16.5 ks \\
0112970201 & M2 & 17.2 ks & 16.2 ks \\
0112970201 & PN & 11.8 ks & 9.3 ks \\
0144220101 & M1 & 49.4 ks & 25.3 ks \\
0144220101 & M2 & 49.4 ks & 29.0 ks  \\
0144220101 & PN & 43.7 ks & 15.7 ks  \\
\hline 
\end{tabular}
\end{table}