\begin{table}%t1
\caption{\label{tbl.lines}Transition information and CHIANTI wavelengths for the
  density diagnostics.}
\small%\centerline
{
\begin{tabular}{llll}
 \hline\hline\noalign{\smallskip}
Ion & Wavelength/\AA & Transition & EA$^a$/cm$^{-2}$ \\
\hline\noalign{\smallskip}
\ion{Fe}{xii}
     &186.854 &$\rm 3s^23p^3$ $\rm ^2D_{3/2}{-}3s^23p^2(^3P)3d$ $\rm ^2F_{5/2}$
     &0.114 \\
     &186.887 &$\rm 3s^23p^3$ $\rm ^2D_{5/2}{-}3s^23p^2(^3P)3d$ $\rm ^2F_{7/2}$
     &0.115 \\
     &195.119 &$\rm 3s^23p^3$ $\rm ^4S_{3/2}{-}3s^23p^2(^3P)3d$ $\rm ^4P_{5/2}$ 
     &0.303 \\
     &196.640 &$\rm 3s^23p^3$ $\rm ^2D_{5/2}{-}3s3p^3(^1D)3d$ $\rm ^2D_{5/2}$ 
     &0.301 \\
\noalign{\smallskip}
\ion{Fe}{xiii}~
     &196.540 &$\rm 3s^23p^2$ $\rm ^1D_2{-}3s^23p3d$ $\rm ^1F_3$ & 0.302 \\
     &202.044 &$\rm 3s^23p^2$ $\rm ^3P_0{-}3s^23p3d$ $\rm ^3P_1$ & 0.084 \\
     &203.797 &$\rm 3s^23p^2$ $\rm ^3P_2{-}3s^23p3d$ $\rm ^3D_2$ & 0.044 \\
     &203.828 &$\rm 3s^23p^2$ $\rm ^3P_2{-}3s^23p3d$ $\rm ^3D_3$ & 0.044 \\
\hline\end{tabular}}
 \smallskip
 $^a$ Effective area values. 
\end{table}