\begin{table}%tA.1
%\hspace*{-9.2cm}\begin{minipage}{18cm}

\caption{Log of the observations used.\label{tdts}}
%\centerline
{
\begin{tabular}{lccccc}
\hline
\hline
Transition  & Observing & ISO    & LWS      & Spectral   & Repeated \\
            & Mode      & TDT    & detector & resolution & scans\\
            &           & Number &          & (km~s$^{-1}$) &\\
\hline 
\noalign{\vskip.5mm}
\multicolumn{6}{l}{$^{16}$OH} \\
$^{2}\Pi_{3/2}~J=5/2$--3/2 (119~$\mu$m) & L03  & 50601013 & LW2 & 33 & 3\\
\hline 
\noalign{\vskip.5mm}
$^{2}\Pi_{1/2}$--$^{2}\Pi_{3/2}$  & L03   & 50400823 & SW2 & 61 & 3\\
$J=3/2$--3/2 (53~$\mu$m)          & L03   & 50601013 & SW2 & 61 & 3\\
                                  & L03   & 50700707 & SW2 & 61 & 3 \\
                                  & L03   & 50800317 & SW2 & 61 & 3 \\
\hline 
\noalign{\vskip.5mm}
$^{2}\Pi_{1/2}$--$^{2}\Pi_{3/2}$& L03   & 50900521 & SW5 & 40 & 3 \\
$J=1/2$--3/2 (79~$\mu$m)  & L03   & 50600814 & SW5 & 40 & 3 \\
 & L03   & 50600603 & SW4 & 40 & 3\\
 & L03   & 50700208 & SW4 & 40 & 3\\
 & L03   & 83800606 & SW4 & 40 & 4 \\
 & L03   & 50600506 & SW4 & 40 & 3 \\
\hline 
\noalign{\vskip.5mm}
\multicolumn{6}{l}{$^{18}$OH} \\
$^{2}\Pi_{3/2}~J=5/2$--3/2 (120~$\mu$m) & L03 & 50601013 & LW2 & 33 & 3 \\
  & L03 & 50700610 & LW2 & 33 & 3 \\
 & L04 & 49401705 & LW2 & 33 & 15  \\
  & L04 & 46201118 & LW2 & 33 & 11 \\
  & L04 & 46900332 & LW2 & 33 & 14 \\
\hline
\end{tabular}}
\end{table}