\begin{table}%t4
\caption{\label{tab4_int_b}b) Line intensity ratios relative to that of 258.37~\AA\  for the SERTS/EIS observation. The caption and footnotes are the same as in Table~\ref{tab4_int}a.}
\par
%\centering
\small
\begin{tabular}{cccrcrccclc} 
\hline\hline
%&&&&&&&&&& \\[-8pt]
${\rm \lambda_{obs}}$ & \multicolumn{2}{c}{\rm Ratio} &
\multicolumn{1}{c}{$\lambda^a$} & $I/I_{\rm ref}^{a}$  &
\multicolumn{1}{c}{$\lambda^b$} & $I/I_{\rm ref}^{b}$ &
\multicolumn{4}{c}{\rm Transition}  \\
\cline{8-11}
{\mbox \AA}  & ${\rm SERTS^{\dag}}$ & ${\rm EIS^{\dag}}$
& \multicolumn{1}{c}{\mbox \AA} &  & \multicolumn{1}{c}{\mbox \AA}
&     &
\multicolumn{2}{c}{\rm Upper}  & \multicolumn{2}{c}{\rm Low} \\
\hline
%&&&&&&&&&& \\[-8pt]
253.81  &  0.54(0.21)   & 0.19  & $-253.788$     &   0.19 &   $-253.787$ & 0.19 & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
256.32  &  4.15(1.24)   & 1.02  & $-256.366$     &   0.40 &   $-256.384$ & 0.42 & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
258.37  &  1.00(0.31)   & 1.00  & $-258.371$     &   1.00 &   $-258.371$ & 1.00 & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
261.05  &  0.38(0.13)   & 0.04  & $-261.044$     &   0.37 &   $-261.063$ & 0.34 & ${\rm  2s 2p^2 }$ & ${\rm ^2P_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
271.99  &  0.37(0.12)   & 0.34  & $-272.006$     &   0.29 &   $-271.983$ & 0.31 & ${\rm  2s 2p^2 }$ & ${\rm ^2S_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
277.27  &  0.32(0.11)   & 0.26  & $-277.278$     &   0.24 &   $-277.254$ & 0.26 & ${\rm  2s 2p^2 }$ & ${\rm ^2S_{1/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
347.41  &  0.75(0.27)   & ...   & $-347.409$     &   0.65 &   $-347.403$ & 0.71 & ${\rm  2s 2p^2 }$ & ${\rm ^2D_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{1/2}}$\\
356.03  &  0.80(0.20)   & ...   & $-356.030$     &   0.65 &   $-356.011$ & 0.76 & ${\rm  2s 2p^2 }$ & ${\rm ^2D_{5/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\
        &               &       & $-356.055$     &   0.09 &   $-356.050$ & 0.10 & ${\rm  2s 2p^2 }$ & ${\rm ^2D_{3/2}}$  &   ${\rm \to ~2s^2 2p}$ & ${\rm ^2P_{3/2}}$\\[2pt]
\hline
\end{tabular}
\end{table}