Table B.1
Spectroscopic and observational line parameters for CH3CN.
| Freq. | Transition | Eup | A | vlsr | Tpeak | Δv1∕2 | W | Nup/gup | Comments |
|---|---|---|---|---|---|---|---|---|---|
| (GHz) | (K) | (10−4 s−1) | (km s−1) | (K) | (km s−1) | (K km s−1) | (1010 cm−2) | ||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
| 238.766 | 139–129 | 658 | 4.21 | 56.2 (0.3) | 0.8 (0.1) | 8.0 (0.7) | 7.1 (0.5) | 1.7 | D |
| 238.844 | 138–128 | 537 | 5.03 | 54.3 (0.2) | 1.0 (0.1) | 7.9 (0.4) | 8.8 (0.4) | 3.6 | D |
| 238.913 | 137–127 | 430 | 5.75 | 55.9 (0.2) | 1.7 (0.1) | 6.9 (0.4) | 12.2 (1.0) | 4.4 | PB |
| 238.972 | 136–126 | 337 | 6.38 | 55.9 (1.2) | 2.9 (0.2) | 8.5 (1.2) | 26.2 (1.3) | 4.2 | PB |
| 239.023 | 135–125 | 259 | 6.91 | – | ≤3.6 0.3 | – | ≤40.0 | ≤11.9 | B |
| 239.064 | 134–124 | 195 | 7.35 | 55.7 (1.1) | 3.5 (0.2) | 8.4 (0.3) | 31.5 (1.0) | 8.8 | D |
| 239.096 | 133–123 | 145 | 7.69 | 55.4 (0.6) | 4.6 (1.2) | 8.2 (1.2) | 40.7 (5.5) | 5.4 | D |
| 239.120 | 132–122 | 109 | 7.93 | 55.9 (1.2) | 4.7 (0.4) | 8.3 (1.2) | 41.4 (3.5) | 10.8 | D |
| 239.133 | 131–121 | 87 | 8.07 | – | ≤6.0 | – | ≤91.9 | ≤23.4 | B |
| 239.138 | 130–120 | 80 | 8.12 | – | ≤6.0 | – | ≤91.9 | ≤23.3 | B |
Notes. (1) Frequencies. (2) Transition. (3) Energy of the upper level. (4) Einstein coefficient. (5) Local Standard of Rest velocity (LSR velocity). (6) Brightness temperature. (7) Line width at half intensity. (8) Integrated intensities over the line profile. (9) Column densities of the upper state of the transition with respect to the rotational degeneracy. (10) Detected (D), blended (B), and partially blended (PB) lines are specified.
References. We used the spectroscopic data parameters from Boucher et al. (1977), Kukolich et al. (1973), Kukolich (1982), Anttila et al. (1993), Gadhi et al. (1995), and Cazzoli & Puzzarini (2006). The spectroscopic data parameters are available in the JPL catalog (Pickett et al. 1998).
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