\begin{table}%t2
\caption{\label{obs}List of observational parameters for the IRAM 30m
  and CSO telescopes.} 
\label{table2} 
%\centerline
 {\small\begin{tabular}{lccccccccc}
\hline \hline
Species & Line & E$_{\rm up}$ &Frequency & $HPBW$& Instrument$^a$&$\eta_{\rm mb}$ & Receiver& $\delta \varv$ & $T_{\rm sys}$\\ 
&&  [cm$^{-1}$] &[GHz]& [\arcsec]& & & & [m$\point$s$^{-1}$] &[K]\\
\hline
CS & 3--2 & 10 & 146.969 & 17 & 30m & 0.69 & D150 &  160  & 315--350  \\
 & 5--4 & 24 & 244.936 & 10 & 30m & 0.48 & A230 &  96  & 530--860 \\
 & 7--6 & 46 & 342.883 &  24 & CSO & 0.75 & 345 & 43 &  1210--1340 \\
%\hline
C$^{34}$S & 3--2 & 10  & 144.617 & 17 & 30m & 0.69 & D150 & 162& 270--390 \\
 & 7--6 & 46 & 337.396  & 25 & CSO & 0.75 & 345 & 43 & 1260--1760  \\
%\hline
SO  & $3_4{-}2_3$ & 11 & 138.178 & 18 & 30m & 0.70 & D150 & 170  & 300--330  \\
 & $5_6{-}4_5$ & 24 & 219.949 & 11 & 30m & 0.55 & B230 & 110 & 590--930   \\
 & $6_5{-}5_4$ & 35 & 251.825 & 10 & 30m & 0.48  & D270 & 190 & 750--830 \\
 & $8_8{-}7_7$ & 61 & 344.308 & 24 & CSO & 0.75 & 345 & 43 & 1020--1050 \\
%\hline
$^{34}$SO & $3_4{-}2_3$ & 11 & 135.775  & 18 & 30m & 0.70 & D150 & 170 & 290--350 \\
& $8_8{-}7_7$ & 61 & 337.582  & 25 & CSO & 0.75 & 345 & 43 & 1020--1060\\ 
%\hline
SO$_2$ & $5_{1,5}{-}4_{0,4}$ & 11 &135.696 & 18 & 30m & 0.70 & D150 &170  & 270--400   \\
& $10_{0,10}{-}9_{1,9}$ & 34 & 160.827 & 15 & 30m & 0.66 & C150 & 150 & 350--520  \\
& $11_{1,11}{-}10_{0,10}$ & 42 &221.965 & 11 & 30m & 0.55 & B230 & 100 & 530--550 \\
& $14_{0,14}{-}13_{1,13}$ & 65 & 244.254 & 10 & 30m & 0.48 & A230 & 190 & 830--1430   \\
& $18_{0,18}{-}17_{1,17}$ & 105 & 321.330 & 26  & CSO & 0.75 & 345 & 45 & 770--820   \\ 
& $28_{4,24}{-}28_{3,25}$ & 289 & 267.719 & 9  & 30m & 0.46 & D270 & 170 & 470--510 \\
%\hline
$^{34}$SO$_2$ 	& $5_{1,5}{-}4_{0,4}$ & 11 & 133.471 & 18 & 30m & 0.70 & D150 & 170 & 200--220 \\
%\hline
OCS  & 8--7 &  14 & 97.301 & 25 & 30m & 0.77 & A100 & 240 & 140--160   \\
& 13--12 & 37 & 158.107 & 15 & 30m & 0.66 & C150 & 150 & 340--360   \\
& 19--18 & 77 & 231.060 & 11 & 30m & 0.52 & A230 & 100 & 450--580  \\
%\hline
OC$^{34}$S  & 8--7 & 14 & 94.922 & 25 & 30m & 0.77 & B100 & 240 & 140-160 \\
%\hline
H$_2$S  & $1_{1,0}{-}1_{0,1}$ & 19 & 168.762 & 14 & 30m & 0.70 & D150 & 140 & 610--800  \\
& $2_{2,0}{-}2_{1,1}$ & 58 & 216.710 & 11 & 30m & 0.57 & B230 & 110 & 410--600  \\
%\hline
H$_2^{34}$S & $1_{1,0}{-}1_{0,1}$ & 19 & 167.910 & 14 & 30m & 0.70 & D150 & 140 & 630--670\\
\hline
\end{tabular}}
\medskip
$^a$ Conversional factor is $S/T_{\rm mb}=4.95$~Jy/K for IRAM~30m telescope and $S/T_{\rm mb}=74$~Jy/K for CSO telescope.
\end{table}