\begin{table}%t7
\caption{\label{model.lines}Model $\mathcal{C}$ parameters for the narrow emission lines.} 
%\centerline
{\small
\begin{tabular}{@{}llllll@{}}
\hline\hline
\multicolumn{1}{c}{Line} &\multicolumn{1}{c}{$E_{\rm lab}$} &\multicolumn{1}{c}{$E_{\rm rest}$}&\multicolumn{1}{c}{$\lambda_{\rm rest}$} & \multicolumn{1}{c}{$\sigma$}  & $K_{\rm line}$      \\
\noalign{\smallskip}
\hline	
\noalign{\smallskip}			  
O{\sc vii}           (f) & 0.5610 & $0.564^{(a)}$             & $21.97^{(a)}$           & $0$ (frozen)            & $\rm 16_{-14}^{+14}$ \\[3pt]
O{\sc vii}           (r) & 0.5740 & $0.579^{(a)}$             & $21.41^{(a)}$           & $0$ (frozen)            & $\rm 5_{-3}^{+3}$  \\[3pt]
Fe{\sc xviii}          & 0.7035 & $\rm 0.708_{-0.004}^{+0.005}$ & $\rm 17.50_{-0.09}^{+0.11}$ & $\rm 0.004_{-(a)}^{+0.004}$ & $\rm 3_{-3}^{+1} $ \\[3pt]
Ne{\sc ix}  K$\alpha$    & blend  & $\rm 0.917_{-0.015}^{+0.007}$ & $\rm 13.52_{-0.22}^{+0.10}$ & 0.0001$^{(a)}$          & $\rm 2_{-1}^{+2} $ \\[3pt]
\hline 
\end{tabular}}
\smallskip
\par
$E_{\rm lab}$ is the laboratory energy of the lines. $E_{\rm rest}$ and 
  $\lambda_{\rm rest}$ are the energy and wavelength of the lines given in the
  rest frame of the object. 
  $E_{\rm lab}$, $E_{\rm rest}$ and $\sigma$ are given in keV, $\lambda$ in
  \AA\ and $K_{\rm line}$ in $10^{-5}$~ph~cm$^{-2}$~s$^{-1}$.   
  $^{(a)}$~Unconstrained parameter, see text. Errors quoted are at 90{\%} confidence level.
\end{table}