\begin{table}%T4
\caption{\label{source10}Methanol rotational temperatures and column densities, assuming a 10$''$ source size.}
\small%\centerline
{
\begin{tabular}{ccccccc}
\hline
\hline
Source & \multicolumn{2}{c}{CH$_3$OH}  & \multicolumn{2}{c}{CH$_2$DOH} & CH$_3$OD & CHD$_2$OH \\
     & $T_{\rm rot}$ &  $N_{\rm tot}$ & $T_{\rm rot}$ &  $N_{\rm tot}$ &  $N_{\rm tot}$ & $N_{\rm tot}$ \\
 &  (K) &   ($\times$10$^{14}$~cm$^{-2}$) &   (K) & ($\times$10$^{14}$~cm$^{-2}$) &   ($\times$10$^{13}$~cm$^{-2}$)  & ($\times$10$^{14}$~cm$^{-2}$) \\
\hline
IRAS 4A & 38.0~$\pm$~3.2  & 6.9~$\pm$~1.4  & 27.1~$\pm$~1.3     & 4.3~$\pm$~0.4 & 3.1~$\pm$~0.7$^c$ & 1.1~$\pm$~0.17$^c$ \\
IRAS 4B & 84.9~$\pm$~16.8 & 8.0~$\pm$~2.7  & 15.6~$\pm$~0.5     & 2.9~$\pm$~0.2 & 1.1~$\pm$~0.20$^c$ & 0.90~$\pm$~0.10$^c$ \\
IRAS 2  & 207~$\pm$~48.1  & 10.1~$\pm$~3.7     & 55.3~$\pm$~4.9     & 5.2~$\pm$~0.8 & $\le$8.0 & 2.1~$\pm$~0.4$^c$ \\
L1448N  & 27.5~$\pm$~4.5  & 1.2~$\pm$~0.47 & 27.5~$\pm$~4.5$^a$ & 2.1~$\pm$~0.6$^b$ & $\le$8.0 & $\le$10 \\
L1448mm & 76.3~$\pm$~19.1 & 1.6~$\pm$~0.70 & 76.3~$\pm$~19.1$^a$& 11.3~$\pm$~4.7$^b$ & 40~$\pm$~16$^b$ & $\le$6.3 \\
L1157mm & 112~$\pm$~201   & 1.9~$\pm$~5.2  & 112~$\pm$~201$^a$  & 10.3~$\pm$~27.7$^b$ & 22~$\pm$~66$^b$ & $\le$9.6 \\
\hline
\end{tabular}}
\smallskip
$^a$ Temperature fixed to the rotational temperature of CH$_3$OH.\\
$^b$ Should be taken as an upper limit, as the rotational temperature is likely to be overestimated.\\
$^c$ Temperature fixed to the rotational temperature of CH$_2$DOH.\\
\end{table}