Table 1: Line frequencies and average beam sizes (HPBW).
Line Transition Freq. IRAM CSO KPNO
    [GHz] [ $^{\prime\prime}$] [ $^{\prime\prime}$] [ $^{\prime\prime}$]
HCN* 1-0 88.632 26.6 -  
CH3OH 30-20E 145.094 17.0 - 41
CH3OH 3-1-2-1E 145.097 17.0 - 41
CH3OH 30-20A+ 145.103 17.0 - 41
CH3OH 32-22E 145.126 17.0 - 41
HC3N 16-15 145.561 16.8 -  
OCS 12-11 145.947 16.8 -  
CS 3-2 146.969 16.6 - 40
CH3CN 83-73 147.149 16.6 - 40
CH3CN 82-72 147.163 16.6 - 40
CH3CN 81-71 147.172 16.6 - 40
CH3CN 80-70 147.175 16.6 - 40
H2CO 211-110 150.498   - 39
CH3OH 70-7-1 E 156.828 15.4 - 38
CH3OH 60-6-1 E 157.049 15.4 - 38
CH3OH 50-5-1 E 157.179 15.4 - 38
CH3OH 40-4-1 E 157.246 15.4 - 38
CH3OH 30-3-1 E 157.270 15.4 - 38
CH3OH 10-1-1 E 157.272 15.4 - 38
CH3OH 20-2-1 E 157.276 15.4 - 38
H2S 110-101 168.763 14.4 - 35
HNCO 100,10-90,9 219.798 11.0    
SO NJ=65-54 219.949 11.0    
HCOOH 100,10-90,9 220.038 11.0    
CH3OH 80-71 E 220.078 11.0    
H2CO 312-211 225.697 10.9 31  
CO 2-1 230.538 10.7 30.5  
CH3OH 50-40 E 241.700 10.2 29  
CH3OH 5-1-4-1 E 241.767 10.2 29  
CH3OH 50-40 A+ 241.791 10.2 29  
CH3OH 51-41 E 241.879 10.2 29  
CH3OH 52-42 A+ 241.888 10.2 29  
CH3OH 52-4E 241.905 10.2 29  
CS 5-4 244.936 10.0 28.5  
CH3OH 93-92 A-+ 251.360 9.8 28  
CH3OH 83-82 A-+ 251.517 9.8 28  
CH3OH 73-72 A-+ 251.642 9.8 28  
CH3OH 63-62 A-+ 251.738 9.8 28  
CH3OH 53-52 A-+ 251.812 9.8 28  
SO NJ=56-45 251.826 9.8 28  
CH3OH 43-42 A-+ 251.867 9.8 28  
CH3OH 53-52 A+- 251.891 9.8 28  
CH3OH 63-62 A+- 251.896 9.8 28  
CH3OH 43-42 A+- 251.900 9.8 28  
CH3OH 33-32 A-+ 251.906 9.8 28  
CH3OH 33-32 A+- 251.917 9.8 28  
CH3OH 73-72 A+- 251.924 9.8 28  
CH3OH 83-82 A+- 251.985 9.8 28  
CH3OH 93-92 A+- 252.090 9.8 28  
CH3OH 103-102 A+- 252.253 9.8 28  
NS 11/2-9/2 e 253.571 9.7    
NS 11/2-9/2 f 253.969 9.7    
CH3OH 20-1-1 E 254.015 9.7    
HC3N 28-27 254.700   27.5  
HCN* 3-2 265.886 9.4 26.5 22.5
HNC 3-2 271.981 9.3 25.9 -
CH3OH 21-20 A-+ 304.208 - 23.0 -
CH3OH 41-40 A-+ 307.166 - 22.8 -
CS 7-6 342.883 - 20.6 -
CO 3-2 345.796 - 20.4 -
H2CO 515-414 351.769 - 20.0 -
HCN 4-3 354.505 - 19.8 -
HDO 110-101 509.292 - 14.0 -
Notes: frequencies are from Müller et al. (2005) or Pickett et al. (1998) (see text).
"-'' Means that this telescope is not equiped to observe this line.
* The SEST beam sizes at 89 and 266 GHz are 54 $^{\prime\prime}$ and 18.5 $^{\prime\prime}$ respectively.


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