\begin{table}%ta.1
  \caption {\label{SEST_obs}Molecular line observations with the 15~m
    SEST.}
%\centerline
 {\begin{tabular}{rccccclcl}
\hline
\hline
\noalign{\smallskip}
Transition & Frequency  &  HPBW   & $\eta_{\rm mb}$  & $T_{\rm sys}$ & $T_{\rm rms}$ & Backend  &  $\Delta \upsilon_{\rm lsr}$ & $\int\!\!T_{\rm A}^{\star}~{\rm d}\upsilon$ \\  
                  &   (MHz)         & (\asec)   &                                 & (K)    & (mK)  &                   &  (\kmpers)                                    & (K \kmpers)                                               \\ 
\hline
CO (2--1)  & 230538.0         &  23      & 0.50             &  \phantom{1}500    &   95/10   & HRS/LRS           & $-26.3$ to $-0.3$  & $15.6 \pm 0.3$     \\
CO (3--2)  & 345796.0         &  15      & 0.25             & 1600                        &  470/70  & HRS/LRS            & $-16.4$ to $+0.8$ & $13.6 \pm 1.4$      \\
SiO (2--1) & \phantom{1}86846.9 & 58 & 0.75       &  \phantom{1}160    & 10$^{a}$           & HRS          & &  \\
SiO (3--2) & 130268.7        &  38      & 0.68              &  \phantom{1}190    & 15$^{a}$          & HRS          & &  \\
SiO (5--4) & 217104.9        &  23      & 0.61              &  \phantom{1}750    & 35/7$^{a}$       & HRS/LRS & &  \\
  \noalign{\smallskip}
  \hline
  \end{tabular}}
\par
\smallskip
Note to the table: $^{a}$ This is the rms of the average spectrum, including all positions.
\end{table}