\begin{table}%t3
\par
\caption{\label{tab:cont}Continuum parameters for all observations.}             % title of Table
%\centering
                          % used for centering table
\begin{tabular}{c c c c c}
\hline\hline   
\noalign{\smallskip}
RGS \\
Observation & $F_{\rm PL}$\tablefootmark{a} & $\Gamma_{\rm PL}$ & $F_{\rm MBB}$\tablefootmark{a} & $kT_{\rm MBB}$ (keV) \\    % table heading 
\hline                        % inserts single horizontal line
   1 & $5.42 \pm 0.07$ & $2.30 \pm 0.03$ & $0.59 \pm 0.11$ & $0.092 \pm 0.006$ \\      % inserting body of the table
   2 & $5.73 \pm 0.08$ & $2.35 \pm 0.03$ & $0.67 \pm 0.17$ & $0.093 \pm 0.007$ \\
   3 & $4.90 \pm 0.10$ & $2.06 \pm 0.04$ & $0.91 \pm 0.11$ & $0.129 \pm 0.006$ \\      % inserting body of the table
 all & $5.44 \pm 0.05$ & $2.26 \pm 0.02$ & $0.68\pm0.09$ & $0.096\pm0.004$ \\
\hline
RGS + pn \\
%\hline
Observation & $F_{\rm PL}$\tablefootmark{a} & $\Gamma_{\rm PL}$ & $F_{\rm MBB}$\tablefootmark{a} & $kT_{\rm MBB}$ (keV) \\    % table heading 
\hline                        % inserts single horizontal line
   1 & $5.41 \pm 0.05$ & $2.30\pm0.01$ & $0.61\pm0.06$ & $0.092\pm0.003$ \\      % inserting body of the table
   2 & $5.72 \pm 0.06$ & $2.35\pm0.02$ & $0.67\pm0.11$ & $0.093\pm0.005$ \\
   3 & $4.94 \pm 0.06$ & $2.07\pm0.02$ & $0.87\pm0.05$ & $0.129\pm0.002$ \\      % inserting body of the table
 all & $5.51 \pm 0.02$ & $2.27\pm0.01$ & $0.63\pm0.04$ & $0.095\pm0.002$ \\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{The unabsorbed flux in the 0.3--2~keV band in 10$^{-14}$~W~m$^{-2}$.}}\vspace*{-2mm}
\end{table}