Table 2: Observed lines.
  Molecule Transition Obs. Theor. Obs-calc $\int T\rm {_{mb} d}\nu$
      frequencya freqc    
      (MHz)b (MHz)b (km s-1) (K km s-1)b
  HC5N 31-30 82 538.840(3) 82 539.3(1) -0.7 12.14(4)
  c-SiC3 72,5-62,4 82 563.3(11) 82 563.525(5) -1.0 0.23(32)
  B1377d 30-29 82 608.1(4)     0.65(32)
  13CCCH NJ = 99,5-88,5 82 679.8(101) 82 680.9-82 688.4   0.55(42)
  C8H ($\Pi_{3/2}$) 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)
  SiC4 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)
  C4H $\nu_7$ = 1 ($\Pi_{3/2}$) f 11.5-10.5 106 133.02(3) 106 133.37(9) -0.99 4.15(19)
  C2S NJ = 89-78 106 347.55(3) 106 347.73(2) -0.51 4.89(19)
  HC5N 40-39 106 498.78(3) 106 499.4(3) -1.7 5.04(19)
  C6H 47-46 129 836.5(2) 129 836.13(7) 0.3 0.39(6)
  C8H ($\Pi_{1/2}$) 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-CC13CH 31,3-21,2 129 980.48(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)
  C2S NJ = 1211-1110 153 449.12(6) 153 449.77(1) -1.27 0.98(9)
  NaCN 100,10-90,9 153 556.7(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)
  HC2N NJ = 78-67 153 745.9(4) 153 746.21(1) -0.7 0.43(9)
  HC2N NJ = 77-66 153 803.000^e 153 804.03(2) -2.00 0.46(12)
  U153816.0   153 816.000^e     0.43(12)
  C4H, $\nu=2^2$ ( $\Delta_{3/2}$) 15.5-14.5 153 841.1(2) 153 841.57(6) -0.9 0.75(9)
  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)
  HC3N $\nu_7=1$ 22-21 200 625.8(25) 200 626.933(3) -1.6 0.76(25)
  C4H $\nu_7=1$ ($\Pi_{3/2}$) f 21.5-20.5 200 763.52(8) 200 763.92(3) -0.6 6.34(25)
  C4H $\nu_7=2^0$ NJ = 2121.5-2020.5 200 789.1(1) 200 789.38(3) -0.4 3.81(25)
  C4H $\nu_7=2^0$ NJ = 2120.5-2019.5 200 844.2(1) 200 844.80(3) -0.9 4.82(51)
$\star $ HC3N $\nu_7=1$ 22-21 200 914.8(137) 200 913.942(3) 1.3 0.51(51)
  C4H $\nu_7=2^2$ ( $\Delta_{5/2}$) 20.5-19.5 201 288.4(1) 201 288.37(3) 0.0 0.94(8)
  NaCN 141,13-131,12 224 029.9(3) 224 030.7(3) -1.1 0.57(7)
  NaCN 142,12-132,11 224 083.5(11) 224 082.7(4) 1.3 0.59(7)
  NaCN 151,15-141,14 224 232.8(7) 224 232.2(4) 0.8 0.47(22)
  C3H, $\nu_4=1$ NJ = 109.5-98.5 224 355.1(12) 224 354.2(2) 1.2 0.47(22)
  SiC2 (sideband im.)   224 508.770^e 232 534.067(6)    
  C17O 2-1 224 713.81(3) 224 714.385(3) -0.50 6.34(7)
  C4H $\nu_7=2^2$ ( $\Delta_{3/2}$) 25.5-24.5 247 958.1(4) 247 959.54(3) -1.8 0.99(25)
$\star $ c-30SiC2 112,10-102,9 248 190.2(6) 248 188.9(33) 1.6 1.48(25)
  C4H $\nu_7=1$ ($\Pi_{3/2}$) f 26.5-25.5 248 291.37(7) 248 291.64(3) -0.33 5.02(17)
  c-C3H2 2215,8-2214,9 271 793.0(2) 271 795.23(5) -2.5 2.74(10)
  HNC $\nu_2=0$ Jl = 30e-20e 271 980.40(3) 271 981.14(2) -0.82 75.80(76)
Notes:
$^{{\it a}}$
Rest frequencies (assuming a source LSR velocity of -27 km s-1) in IRC+10216.
$^{{\it b}}$
The numbers in parenthesis are the estimated uncertainties (1$\sigma$).
$^{{\it c}}$
Frequencies are taken from Müller et al. (2001), Pickett et al. (1998) and the Lovas catalog.
$^{{\it d}}$
B1377 denotes an un-identified species with the rotational constant of 1376.869 MHz as it appears in Kawaguchi et al. (1995).
$^{{\it e}}$
Manually fitted.
$^{\star}$
Denotes a partial overlap or blend of a line with a C2N transition frequency within a $\pm$15 km s-1 linewidth tolerance.

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