\begin{table}%t2
%\centering
\par
\caption{Conversion factors of the line 
intensity in erg s$^{-1}$ cm$^{-2}$ into the velocity integrated 
main beam temperature 
$T_{\rm mb} \Delta v$ observed at the IRAM and JCMT telescopes respectively, 
for the five lines observed towards IRAS~16293$-$2422 \citep{Parise05}.
Last column quotes the $T_{\rm mb} \Delta v$ 
observed towards IRAS~16293--2422 \citep{Parise05}.$^a$~Predicted flux 
from the model simply converted into K km s$^{-1}$ using the conversion factor.
$^b$~Predicted flux derived using an accurate convolution of the signal with the
telescope beam.\label{conversion}  }
\begin{tabular}{ccccccc} 
\hline 
\hline
\noalign{\smallskip}
Transition & Frequency & Telescope & Conversion coeff
 & \multicolumn{3}{c}{IRAS~16293--2422}\\ 
           &  (GHz)    &            & 1~K~km~s$^{-1}$ ($T_{\rm mb} \Delta v$)   & (K km s$^{-1}$) & (K km s$^{-1}$) & (K km s$^{-1}$)\\ 
 & & & (erg s$^{-1}$ cm$^{-2}$) & Conversion$^a$ & Convolution$^b$ & Obs$^c$ \\
\noalign{\smallskip}
\hline 
\noalign{\smallskip}
 $1_{1,0}{-}1_{1,1}$ & 80.578  & IRAM   & 1.4~$\times$~10$^{-17}$ & 0.19  & 0.21 & 0.40  \\ 
 $3_{1,2}{-}2_{2,1}$ & 225.897 & IRAM   & 4.1~$\times$~10$^{-17}$ & 1.7   & 1.8  & 1.7   \\ 
 $2_{1,1}{-}2_{1,2}$ & 241.561 & IRAM   & 4.4~$\times$~10$^{-17}$ & 1.5   & 1.5  & 2.0   \\ 
 $2_{2,0}{-}3_{1,3}$ & 266.161 & IRAM   & 4.9~$\times$~10$^{-17}$ & 0.20  & 0.22 & 0.21  \\ 
 $1_{0,1}{-}0_{0,0}$ & 464.924 &  JCMT & 4.0~$\times$~10$^{-16}$ & 6.3   & 5.4  & 5.5   \\
\hline 
\end{tabular} 
\end{table}