\begin{table}%t2
  \caption{\label{cont}Mrk 279 RGS continuum best-fit parameters.}
   %\centerline
{\small
  \begin{tabular}{lcccc}
    \hline
    \hline
    \noalign{\smallskip}
    Dataset & $\Gamma$ & $F_{\rm PL}$\tablefootmark{a} & $T_{\rm mbb}$ (keV)& $F_{\rm mbb}$\tablefootmark{a}  \\
    \noalign{\smallskip}
    \hline
    $H$ & $2.03\pm0.07$ & $2.05\pm0.06$ & $0.14\pm0.01$ & $0.16\pm0.02$ \\
    $L$ & $1.89\pm0.08$ & $1.72\pm0.05$ & $0.14\pm0.01$ & $0.16\pm0.02$ \\ 
    $R$ & $2.01\pm0.08$ & $1.85\pm0.06$ & $0.13\pm0.01$ & $0.13\pm0.03$ \\ 
    \hline
  \end{tabular}}
    \tablefoot{\tablefoottext{a}{0.5--2~keV flux, in units of $10^{-11}$~erg cm$^{-2}$~s$^{-1}$.}}
\end{table}