\begin{table}%t4
\caption{\label{tab4_int}a) SERTS/EIS observation (Keenan et~al. \cite{KOT00}; Brown et~al. \cite{BFS08}) for a solar active region along with predictions (for the line emissivity~$\epsilon$   and intensity~$I$, based upon the observed line flux at 258.37~\AA) at $T_\rme=10^{6.1}$~K and $n_\rme=1.6$~$\times$ $10^9$~cm$^{-3}$. The ``$-$''~tag in the $\lambda$-columns denotes those wavelengths corrected by experimental energies.}
\par
\small%\centerline
 {
 \begin{tabular}{cccrccrcccclc} 
 \hline\hline
%&&&&&&&&&&&& \\[-8pt]
${\rm \lambda_{obs}}$ & \multicolumn{2}{c}{\rm Flux} &
\multicolumn{1}{c}{$\lambda^a$} & ${\epsilon^a}$ & $I_{\rm
SERTS}^{a}$
& \multicolumn{1}{c}{$\lambda^b$} & ${\epsilon^b}$& $I_{\rm SERTS}^{b}$ & \multicolumn{4}{c}{\rm Transition} \\
\cline{10-13} {\mbox \AA} & ${\rm SERTS^{\dag}}$ & ${\rm EIS^{\dag}}$
&\multicolumn{1}{c}{\mbox \AA} &${\rm phot.~cm^3~s^{-1}}$ & &
\multicolumn{1}{c}{\mbox \AA} &  ${\rm phot.~cm^3~s^{-1}}$ &  &
\multicolumn{2}{c}{\rm Upper}  & \multicolumn{2}{c}{\rm Low} \\
\hline
%&&&&&&&&&&&& \\[-8pt]
253.81  &  $3.28(1.02){^c}$ & 86.8  & $-253.788$     &   $2.273(-10){\rm ^d}$     & 1.15 & $-253.787$ & $2.762(-10)$ & 1.18  & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
256.32  & 25.26(5.06) & 462.5 & $-256.366$     &   $4.858(-10)$     & 2.46 & $-256.384$ & $6.036(-10)$ & 2.57  & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
258.37  &  6.08(1.35) & 452.3 & $-258.371$     &   $1.203(-09)$     & 6.08 & $-258.371$ & $1.427(-09)$ & 6.08  & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
261.05  &  2.28(0.57) & 17.1  & $-261.044$     &   $4.424(-10)$     & 2.24 & $-261.063$ & $4.909(-10)$ & 2.09  & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
271.99  &  2.22(0.56) & 152.3 & $-272.006$     &   $3.466(-10)$     & 1.75 & $-271.983$ & $4.378(-10)$ & 1.87  & ${\rm  2s 2p^2 }$ & ${\rm ^2S_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
277.27  &  1.97(0.54) & 116.5 & $-277.278$     &   $2.891(-10)$     & 1.46 & $-277.254$ & $3.665(-10)$ & 1.56  & ${\rm  2s 2p^2 }$ & ${\rm ^2S_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
347.41  &  4.55(1.27) & ...   & $-347.409$     &   $7.764(-10)$     & 3.92 & $-347.403$ & $1.011(-09)$ & 4.31  & ${\rm  2s 2p^2 }$ & ${\rm ^2D_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
356.03  &  4.84(0.56) & ...   & $-356.030$     &   $7.786(-10)$     & 3.94 & $-356.011$ & $1.090(-09)$ & 4.64  & ${\rm  2s 2p^2 }$ & ${\rm ^2D_{5/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
        &             &       & $-356.055$     &   $1.137(-10)$     & 0.57 & $-356.050$ & $1.483(-10)$ & 0.63  & ${\rm  2s 2p^2 }$ & ${\rm ^2D_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\[2pt]
\hline
\end{tabular}}
\medskip
$\dag$ Units = $10^{12}$photons~cm$^{-2}$~s$^{-1}$~sr$^{-1}$;
$^{a,b,c,d}$~the same definition as in Table~\ref{tab_int}a.
\end{table}