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Table A.6
Observed line fluxes 
(K km s-1) for CH3CN and its isotopic species.
| Frequency | Transition | E up | A | Sources | ||
| [GHz] | [K] | [s-1] | IRAS 20126+4104 | IRAS 18089-1732 | G31.41+0.31 | |
|
|
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| CH3CN | ||||||
|
|
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| 238.844 | 138–128 | 537 | 5.0(–4) | – | <0.22 | <0.17 |
| 238.913 | 137–127 | 430 | 5.8(–4) | <0.21 | ~0.37 (0.27) | 1.82 (0.62) |
| 238.972 | 136–126 | 337 | 6.4(–4) | ~0.33 (0.38) | ~0.84 (0.37) | 3.22 (1.11) |
| 239.023 | 135–125 | 259 | 6.9(–4) | ~0.93 (0.49) | <6.43 (1.29): | 3.19 (0.88) |
| 239.064 | 134–124 | 195 | 7.4(–4) | ~0.51 (0.38) | 1.17 (0.45) | 5.25 (1.44) |
| 239.096 | 133–123 | 145 | 7.7(–4) | 1.04 (0.40) | 1.64 (0.55) | 5.21 (1.37) |
| 239.120 | 132–122 | 109 | 7.9(–4) | ~0.63 (0.38) | 1.80 (0.61) | 5.71 (1.37) |
| 239.133 | 131–121 | 87 | 8.1(–4) | 0.73 (0.26)* | 1.72 (0.52)* | 4.56 (1.19) |
| 239.138 | 130–120 | 80 | 8.1(–4) | 0.73 (0.26)* | 1.72 (0.52)* | 4.60 (1.15) |
| 330.843 | 186–176 | 408 | 1.9(–3) | ~0.31 (0.26) | 4.63 (1.28) | 7.44 (2.20) |
| 330.913 | 185–175 | 329 | 2.0(–3) | – | 3.59 (1.13) | 5.91 (1.87) |
| 330.970 | 184–174 | 265 | 2.1(–3) | – | 2.81 (0.78) | 6.70 (2.07) |
| 331.014 | 183–173 | 215 | 2.1(–3) | – | 4.66 (1.30) | 8.26 (2.38) |
| 331.046 | 182–172 | 180 | 2.2(–3) | – | 4.51 (1.31) | 10.24 (2.87) |
| 331.065 | 181–171 | 158 | 2.2(–3) | – | 4.01 (1.09)* | 6.25 (1.96) |
| 331.072 | 180–170 | 151 | 2.2(–3) | – | 4.01 (1.09)* | 7.86 (2.30) |
|
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| CH313CN | ||||||
|
|
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| 238.855 | 136–126 | 337 | 9.2(–4) | – | <0.22 | <10.23 (2.58): |
| 238.905 | 135–125 | 259 | 1.0(–3) | <0.21 | <0.22 | <1.00 (0.48): |
| 238.946 | 134–124 | 195 | 1.1(–3) | <0.21 | <0.22 | 2.21 (0.70) |
| 238.978 | 133–123 | 145 | 1.1(–3) | <0.21 | ~0.35 (0.31) | 1.51 (0.58) |
| 239.001 | 132–122 | 109 | 1.2(–3) | <0.21 | <0.22 | ~0.62 (0.35) |
| 239.015 | 131–121 | 87 | 1.2(–3) | <0.21 | <0.22 | 4.61 (0.97)* |
| 239.020 | 130–120 | 80 | 1.2(–3) | <0.21 | <0.22 | 4.61 (0.97)* |
| 330.806 | 184–174 | 265 | 3.0(–3) | <0.31 | <0.32 | <8.08 (2.52): |
| 330.851 | 183–173 | 215 | 3.1(–3) | <0.31 | <2.66 (0.53): | <4.12 (1.23): |
| 330.882 | 182–172 | 179 | 3.1(–3) | <0.31 | <0.32 | ~0.69 (0.49) |
| 330.901 | 181–171 | 158 | 3.2(–3) | <0.31 | <1.49 (0.30): | 2.37 (0.93) |
| 330.908 | 180–170 | 151 | 3.2(–3) | <0.31 | <1.49 (0.30): | 3.48 (1.12) |
Notes.The notation a( − b) stands for a × 10− b. < Means upper limit. ~ Means uncertain detection, S/N ≲ 2. – Means frequency not observed. : Means blended line. * Calculated flux (see Eq. (4)).
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