\begin{table}%t2 \par %\centering \par \caption{\label{13c18o32} Observed positions of \coisoiso~(3$-$2) and line opacities, $\tau_{^{13}{\rm C}^{18}{\rm O}}$.} \par \begin{tabular}{ccccccc} \hline \hline \noalign{\smallskip} Offset & \vlsr & $FWHM$ & $T_{\rm peak}(^{12}{\rm C}^{18}{\rm O}),$ & $\tau_{^{13}{\rm C}^{18}{\rm O}}$ & Note \\ (arcsec) & (\kms) & (\kms) & $T_{\rm peak}(^{13}{\rm C}^{18}{\rm O})$ (K) & & \\ \noalign{\smallskip} \hline \noalign{\smallskip} $-60$, +80 & $2.86 \pm 0.05$ & $0.78 \pm 0.12$ & 10.5, 0.25 & 0.02 & $\ldots$ \\ 0, +60 & $3.13 \pm 0.06$ & $0.92 \pm 0.14$ & \phantom{1}8.1, 0.22 & 0.03 & $\ldots$ \\ +30, +80 & $3.09 \pm 0.05$ & $1.11 \pm 0.09$ & 13.0, 0.38 & 0.03 & P~1 \\ +30, 0 & $3.62 \pm 0.02$ & $1.02 \pm 0.05$ & 16.5, 0.71 & 0.04 & P~3 \\ +60, $-100$ & $2.95 \pm 0.06$ & $1.17 \pm 0.15$ & \phantom{1}6.1, 0.23 & 0.04 & 2 lines? \\ \noalign{\smallskip} \hline \end{tabular} \tablefoot{Error on line ratios is estimated at 15$-$20\%.}\vspace*{3mm} \end{table}