\begin{table}%t2
%\renewcommand{\arraystretch}{0.5}
      \caption{Observed lines.\label{workonpar}}
         {%\fontsize{8pt}{10pt}\selectfont
           %\centerline
{\begin{tabular}{clcslcscsl}
            \hline
            \hline
            \noalign{\smallskip}
  & Molecule & Transition & \multicolumn{1}{c}{Obs.}      &   \multicolumn{1}{c}{Theor.}  &  
                        \multicolumn{1}{c}{Obs-calc}  & \multicolumn{1}{c}{$\int T\rm{_{mb} d}\nu$} \\
  &       &            & \multicolumn{1}{c}{frequency$^a$} &   \multicolumn{1}{c}{freq$^c$}   &   &    \\
  &       &    \multicolumn{1}{c}{ }       & \multicolumn{1}{c}{(MHz)$^b$}     &  
              \multicolumn{1}{c}{(MHz)$^b$}  &  \multicolumn{1}{c}{(km~s$^{-1}$)}       &  
                                                \multicolumn{1}{c}{(K km s$^{-1})^b$}\\ 
 \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
  & HC$_5$N           & 31--30          & 82~538.840(3)     & 82~539.3(1)          & -0.7    & 12.14(4)  \\
  & c-SiC$_3$         & 7$_{2,5}$--6$_{2,4}$ & 82~563.3(11)      & 82~563.525(5)        & -1.0    & 0.23(32) \\
  & B1377$^d$         & 30--29          & 82~608.1(4)       &                       &         & 0.65(32) \\ 
  & $^{13}$CCCH       & $N_J = 9_{9,5}$--8$_{8,5}$ & 82~679.8(101)     & 82~680.9$-$82~688.4   &         & 0.55(42) \\ 
  & C$_8$H ($\Pi_{3/2}$) & e/f 69.5--68.5 & 82~712.4(30)      & 82~713.4$-$82~716.1   &         & 0.18(37) \\
$\star$ & U82736.3          &                  & 82~736.3(3)       &                     &         & 0.17(3)  \\
  & U82787.8          &                  & 82~787.8(6)       &                     &         & 0.37(32) \\
  & SiC$_4$           & 27--26          & 82~819.02(3)      & 82~819.118(4)        & -0.34   & 0.82(3)  \\
  & U82846.2          &                  &  82~846.2(34)     &                     &         & 0.42(51) \\
  & U82882.1          &                  &  82~882.1(30)     &                     &         & 0.23(37) \\
\hline
  & C$_4$H $\nu_7$  =  1 ($\Pi_{3/2}$) & f 11.5--10.5 & 106~133.02(3)     & 106~133.37(9)        & -0.99  &  4.15(19) \\
  & C$_2$S            & $N_J = 8_9$--7$_8$ & 106~347.55(3)     & 106~347.73(2)        & -0.51  &  4.89(19) \\
  & HC$_5$N           & 40--39          & 106~498.78(3)     & 106~499.4(3)         & -1.7   &  5.04(19) \\
\hline
  & C$_6$H            & 47--46          & 129~836.5(2)      & 129~836.13(7)        &  0.3    &  0.39(6) \\
  & C$_8$H ($\Pi_{1/2}$) & e/f 110.5--109.5 & 129~884.6(3)     & 129~885.7$-$129~889.7 &         &  0.29(6) \\
  & U129961.8         &                  & 129~961.8(1)      &                     &         &  0.45(6) \\
$\star$ & c-CC$^{13}$CH     & 3$_{1,3}$--2$_{1,2}$ & 129~980.48(6)     & 129~982.7$-$129~984.6 &         &  0.48(3) \\
  & NaCl              & 10--9           & 130~223.43(3)     & 130~223.64(5)        & -0.76   &  1.87(3) \\
\hline  
  & C$_2$S            &  $N_J = 12_{11}$--11$_{10}$  & 153~449.12(6)     & 153~449.77(1)        & -1.27   & 0.98(9) \\
  & NaCN              & 10$_{0,10}$--9$_{0,9}$ & 153~556.7(5) & 153~557.9(1)       & -2.2    & 1.13(9) \\
  & KCl               & 20--19          & 153~677.9(5)      & 153~677.5(1)         &  0.7    & 0.29(9) \\  
  & U153699.7         &                  & 153~699.7(9)      &                     &         & 0.20(9) \\ 
  & HC$_2$N           &  {\it N}$_J$ = 7$_8$--6$_7$        & 153~745.9(4)      & 153~746.21(1)        & -0.7    & 0.43(9) \\ 
  & HC$_2$N           &  {\it N}$_J$ = 7$_7$--6$_6$        & 153~803.000^e   & 153~804.03(2)          & -2.00   & 0.46(12)\\  
  & U153816.0         &                  & 153~816.000^e   &                       &         & 0.43(12) \\ 
  & C$_4$H, $\nu=2^2$ ($\Delta_{3/2}$) & 15.5--14.5    & 153~841.1(2)    & 153~841.57(6)          & -0.9   & 0.75(9) \\ 
\hline
  & U200411.0         &                  & 200~411.000^e   &                     &         & 1.35(13) \\ 
  & U200449.4         &                  & 200~449.4(4)    &                     &         & 1.14(23) \\ 
  & U200543.8         &                  & 200~543.8(9)    &                     &         & 1.02(51) \\
  & HC$_3$N $\nu_7=1$ & 22--21          & 200~625.8(25)   & 200~626.933(3)       & -1.6    & 0.76(25) \\ 
  & C$_4$H $\nu_7=1$ ($\Pi_{3/2}$) & f 21.5--20.5   & 200~763.52(8)   & 200~763.92(3)        & -0.6  & 6.34(25) \\
  & C$_4$H $\nu_7=2^0$&  $N_J = 21_{21.5}$--20$_{20.5}$  & 200~789.1(1)    & 200~789.38(3)        & -0.4  & 3.81(25) \\
  & C$_4$H $\nu_7=2^0$&  $N_J = 21_{20.5}$--20$_{19.5}$  & 200~844.2(1)    & 200~844.80(3)        & -0.9  & 4.82(51) \\ 
$\star$ & HC$_3$N $\nu_7=1$ & 22--21          & 200~914.8(137)  & 200~913.942(3)       &  1.3  & 0.51(51) \\
  & C$_4$H $\nu_7=2^2$ ($\Delta_{5/2}$) & 20.5--19.5 & 201~288.4(1)   & 201~288.37(3)        &  0.0  & 0.94(8) \\
\hline 
  & NaCN              & 14$_{1,13}$--13$_{1,12}$ & 224~029.9(3) & 224~030.7(3)   & -1.1  & 0.57(7) \\ 
  & NaCN              & 14$_{2,12}$--13$_{2,11}$ & 224~083.5(11) & 224~082.7(4)  &  1.3  & 0.59(7) \\ 
  & NaCN              & 15$_{1,15}$--14$_{1,14}$ & 224~232.8(7) & 224~232.2(4)   &  0.8  & 0.47(22)\\ 
  & C$_3$H, $\nu_4=1$ &  $N_J = 10_{9.5}$--9$_{8.5}$ & 224~355.1(12) & 224~354.2(2) &  1.2 & 0.47(22)\\
  & SiC$_2$ (sideband im.)&              & 224~508.770^e    & 232~534.067(6)      &       &  \\ 
  & C$^{17}$O         & 2--1            & 224~713.81(3)    & 224~714.385(3)      & -0.50 & 6.34(7)  \\
\hline
  & C$_4$H $\nu_7=2^2$  ($\Delta_{3/2}$) & 25.5--24.5   & 247~958.1(4)      & 247~959.54(3)   & -1.8  & 0.99(25) \\
$\star$ & c-$^{30}$SiC$_2$  &  11$_{2,10}$--10$_{2,9}$  & 248~190.2(6) &  248~188.9(33)  & 1.6      & 1.48(25) \\
  & C$_4$H $\nu_7=1$  ($\Pi_{3/2}$) & f 26.5--25.5    & 248~291.37(7)     & 248~291.64(3)      & -0.33 & 5.02(17)  \\
\hline
  & c-C$_3$H$_2$      & 22$_{15,8}$--22$_{14,9}$ & 271~793.0(2)     & 271~795.23(5)      & -2.5  & 2.74(10)   \\
  & HNC $\nu_2=0$     & $J_l = 3_{0e}$--2$_{0e}$ & 271~980.40(3)     & 271~981.14(2)      & -0.82 & 75.80(76) \\
             \hline
         \end{tabular} }}
\begin{list}{}{}
\item[Notes:]
\item[$^{{\it a}}$] Rest frequencies (assuming a source LSR velocity of --27 km s$^{-1}$) in IRC+10216.
\item[$^{{\it b}}$] The numbers in parenthesis are the estimated uncertainties (1$\sigma$).
\item[$^{{\it c}}$] Frequencies are taken from \citet{Mueller-2001-AA-370-L49}, \citet{Pickett-1998-JQSRT-60-883} and the Lovas catalog.
\item[$^{{\it d}}$] B1377 denotes an un-identified species with the rotational constant of 1376.869 MHz as it appears in \cite{Kawaguchi-1995-PASJ-47-853}.
\item[$^{{\it e}}$] Manually fitted.
\item[$^{\star}$] Denotes a partial overlap or blend of a line with a C$_2$N transition frequency within a $\pm$15~km~s$^{-1}$ linewidth tolerance.
\end{list}
   \end{table}