\begin{table}%t1
\caption{\label{tab:log}Log of the {\it XMM-Newton}/RGS observations of MP~Mus and TW~Hya.}
%\centering
\small
\begin{tabular}{lcc}
\hline\hline
Instrument & Start               & Exposure \\
           & (UT)                & (ks)     \\
\hline
\multicolumn{3}{c}{MP~Mus (ObsId 0406030101)} \\
RGS1       & 2006 Aug. 19 09:30:48 & 98.7    \\
RGS2       & 2006 Aug. 19 09:30:56 & 98.8    \\
\hline
\multicolumn{3}{c}{TW~Hya (ObsId 0112880201 )} \\
RGS1       & 2001 Jul.  9 05:51:39 & 29.0    \\
RGS2       & 2001 Jul.  9 05:51:39 & 28.0    \\
\hline
\end{tabular}
\end{table}