\begin{table}%tC.4
\caption{$^{12}$C$^{18}$O line list used for the Sect.~\protect\ref{abunresults} study, consisting of 15~lines.  $\log gf$~data calculated from \protect\citet{GChack94}.}
\label{1218}
%\centering
\small
\begin{tabular}{l@{}c@{\hspace{2mm}}c@{\hspace{2mm}}c@{\hspace{2mm}}c@{\hspace{2mm}}c@{\hspace{2mm}}c@{\hspace{2mm}}c}
\hline  \hline
\multicolumn{2}{c}{Trans.} & Wavelength & $\sigma$ & $\log gf$ & Exc. & $W_\lambda$ & $\log\epsilon_{^{18}{\rm O}}$ \\
& & vac.~(nm) & (cm$^{-1}$) & & (eV) & (pm) & (3D) \\
\hline  
     \multicolumn{2}{c}{1--0} & & & & & & \\
     P&26 & 5033.4006 & 1986.728 & $-$3.572 & 0.159 & 1.09 & 6.01 \\
     P&27 & 5044.7281 & 1982.267 & $-$3.556 & 0.171 & 1.02 & 5.97 \\
     P&34 & 5127.5809 & 1950.237 & $-$3.462 & 0.269 & 0.89 & 5.92 \\
     P&43 & 5243.7159 & 1907.045 & $-$3.370 & 0.427 & 0.88 & 6.00 \\
     R&48 & 4486.1030 & 2229.106 & $-$3.237 & 0.530 & 0.74 & 5.94 \\
     R&49 & 4482.3365 & 2230.979 & $-$3.228 & 0.552 & 0.74 & 5.95 \\
     R&50 & 4478.6546 & 2232.813 & $-$3.219 & 0.574 & 0.72 & 5.95 \\
     \multicolumn{2}{c}{2--1} & & & & & & \\
     P&25 & 5084.5153 & 1966.756 & $-$3.293 & 0.405 & 1.06 & 5.99 \\
     P&29 & 5130.8774 & 1948.984 & $-$3.233 & 0.455 & 1.00 & 5.96 \\
     P&31 & 5154.8355 & 1939.926 & $-$3.205 & 0.482 & 0.98 & 5.95 \\
     \multicolumn{2}{c}{3--2} & & & & & & \\
     P&35 & 5270.2261 & 1897.452 & $-$2.987 & 0.796 & 0.78 & 5.97 \\
     P&40 & 5336.4145 & 1873.917 & $-$2.932 & 0.879 & 0.80 & 6.02 \\
     \multicolumn{2}{c}{4--3} & & & & & & \\
     P&21 & 5167.4916 & 1935.175 & $-$3.077 & 0.871 & 0.45 & 5.91 \\
     P&23 & 5190.1890 & 1926.712 & $-$3.039 & 0.891 & 0.59 & 6.01 \\
     \multicolumn{2}{c}{5--4} & & & & & & \\
     P&34 & 5393.2644 & 1854.165 & $-$2.788 & 1.278 & 0.38 & 5.99 \\
\hline
\end{tabular}
\end{table}