\begin{table}%t1
%\centering
\par
\caption{Net  count rates  (in units of s$^{-1}$) for  \src\ during the two observations.}\label{tab:log}
\begin{tabular}{lcc}
\hline\hline 
 &   Obs~I &   Obs~II  \\
\hline
 RGS1            &    $1.113 \pm{0.007}$     &   $0.874 \pm{0.005}$    \\
 RGS2            &    $1.303 \pm{0.007}$     &   $1.064 \pm{0.006}$    \\
 pn                 & $32.38 \pm{0.04}$      &   $30.33 \pm{0.04}$     \\
 MOS1            &    $ 4.42 \pm{0.03}$      &   $3.74  \pm{0.02}$      \\
 MOS2            &    $ 4.23 \pm{0.01}$      &   $4.11  \pm{0.01}$      \\
\hline
\end{tabular}
\end{table}