\begin{table}%t2
%\centering
\par
\caption{\label{tab:rot}Rotational diagram results for the observed methanol emission.}
\center\begin{tabular}{l r r}
\hline\hline \noalign{\smallskip}
Source & $T_{\rm rot}$ (K) & $N$ (10$^{14}$~cm$^{-2}$)$^a$ \\
\hline
SMM1 & $18.9 \pm 0.9$ & $4.1 \pm 0.7$ \\
SMM3 & $19.5 \pm 1.1$ & $3.4 \pm 0.7$ \\
SMM4 & $15.1 \pm 0.4$ & $12 \pm 1.4$ \\
S68N & $14.4 \pm 0.2$ & $34 \pm 1.7$ \\
%\hline
SMM1-S & $12.6 \pm 2.4$ & 5.7$^{+5.8}_{-5.7}$ \\
\mbox{SMM4-W} & $16.5 \pm 1.3$ & $4.4 \pm 1.4$ \\
SMM4-S & $9.3 \pm 1.0$ & $34 \pm 27$\\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{Column density is the sum of A- and E-type methanol
  column densities.}}
\end{table}