\begin{table}%t2
\caption{The best fit parameters for the continuum for the earlier RGS~observation (Steenbrugge et~al. \cite{steen}) and the present HETGS and LETGS~observations of NGC~5548. The parameters for the HETGS and LETGS are for the best fit model including the three~{\it slab}~components with the outflow velocities frozen to the UV~values.}\label{tab:cont}
%\centerline
{
\begin{tabular}{lccc}
\hline \hline
Parameter & RGS       & HETGS             & LETGS              \\
\hline
pl:norm$^{a}$  & 1.57 $\pm$ 0.03 & 0.90 $\pm$ 0.01 &  1.30 $\pm$ 0.01               \\
pl:lum$^{b}$ & 5.7 $\pm$ 0.1 & 3.62 $\pm$ 0.04 & 4.02 $\pm$ 0.03      \\
pl:$\Gamma$  & 1.77 $\pm$ 0.02 & 1.71 $\pm$ 0.01 & 1.88 $\pm$ 0.01 \\
mbb:norm$^{c}$  & 6.5 $\pm$ 0.7 & $<$400 & 3.5 $\pm$ 0.9               \\
mbb:$T$ (in eV) & 97 $\pm$ 6 & $-$  &  100 $\pm$ 10 \\
\hline
\end{tabular}}
\medskip
$^{a}$ At 1 keV in 10$^{52}$ ph s$^{-1}$ keV$^{-1}$. \\
$^{b}$ The luminosity as measured in the $2{-}10$~keV band in 10$^{36}$~W. \\
$^{c}$ Norm = emitting area times square root of electron density in 10$^{32}$~m$^{1/2}$.
\end{table}