\begin{table}%t2 \caption{\label{tab:delta_c}Significances of the different spectral components. We list the increase in the {\it C}-statistic when the component is omitted from the model and the spectrum is refitted.} %\centering \small \begin{tabular}{lcc} \hline \hline Component & Spectrum B & Spectrum C \\ \hline Modified black body & 7.36 & 88.97 \\ rel. \ion{O}{viii} & 16.84 & 11.32 \\ BLR \ion{O}{viii} & 0 & 16.69 \\ BLR \ion{O}{vii} & 0 & 31.49 \\ narrow \ion{O}{vii} forbidden & 36.08 & 24.60 \\ BLR \ion{C}{vi} & 4.07 & 12.01 \\ warm absorber 1 & -- & 14.53 \\ warm absorber 2 & 12.74 & 17.83 \\ warm absorber 3 & 12.75 & 14.55 \\ warm absorber 4 & 45.19 & 32.89 \\ \hline \end{tabular} \end{table}