\begin{table}%t5
\caption{RGS~line fluxes for prominent emission lines.}
\label{lines}
\small%\centerline
{
\begin{tabular}{lccc}
\hline\hline\noalign{\smallskip}
\multicolumn{1}{l}{Line} &
\multicolumn{1}{c}{Energy} &
\multicolumn{1}{c}{Flux$^\star$} &
\multicolumn{1}{c}{Ratio} \\
\multicolumn{1}{l}{} &
\multicolumn{1}{c}{[eV]} &
\multicolumn{1}{c}{[photons cm$^{-2}$ s$^{-1}$]} &
\multicolumn{1}{l}{LETG/RGS} \\
\noalign{\smallskip}\hline\noalign{\smallskip}
\ion{N}{vii}  &  500         & $\rm 29.0^{+3.1}_{-3.5}$\expo{-6} & 1.53 $\pm$ 0.26 \\
\ion{O}{vii}  &  574/569/561 & $\rm 42.9^{+7.0}_{-7.1}$\expo{-6} & 0.81 $\pm$ 0.19 \\
\ion{O}{viii} &  654         & $\rm 43.5^{+2.8}_{-3.4}$\expo{-6} & 1.17 $\pm$ 0.13 \\
\ion{O}{vii}  &  666         & $\rm ~6.2^{+2.2}_{-2.2}$\expo{-6} & --            \\
\ion{O}{viii} &  775         & $\rm ~8.9^{+2.5}_{-1.6}$\expo{-6} & 2.26 $\pm$ 0.69 \\
\ion{Ne}{ix}  &  922/915/905 & $\rm 45.4^{+5.6}_{-5.4}$\expo{-6} & 1.36 $\pm$ 0.19 \\
\ion{Ne}{x}   &  1022        & $\rm 19.6^{+3.1}_{-3.1}$\expo{-6} & 1.86 $\pm$ 0.32 \\
\hline
\end{tabular}}
\smallskip
$^\star$ Line fluxes with 1$\sigma$ errors. For the He-like ion triplets the sum of the three lines is
given.
\end{table}