Table C.2
Spectroscopic and observational line parameters for CH3CN.
| Frequency | Transition | Eu | A | vLSR | ΔvLSR | TB | W | Nu∕gu | Comments |
|---|---|---|---|---|---|---|---|---|---|
| (MHz) | (K) | (×10−4 s−1) | (km s−1) | (km s−1) | (K) | (K km s−1) | (×109 cm−2) | ||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
| 257 284.935 | 147–137 | 442.4 | 1.1 | −59.03 (0.08) | 3.9 (0.2) | 0.18 (0.01) | 0.75 (0.03) | 1.51 (0.04) | D |
| 257 349.179 | 146–136 | 349.7 | 1.2 | −59.32 (0.03) | 3.7 (0.1) | 0.35 (0.01) | 1.35 (0.02) | 1.25 (0.02) | D |
| 257 403.584 | 145–135 | 271.2 | 1.29 | – | – | ≤0.61 | – | ≤61.97 | B |
| 257 448.128 | 144–134 | 207.0 | 1.35 | −59.08 (0.03) | 3.6 (0.1) | 0.39 (0.01) | 1.47 (0.03) | 2.41 (0.02) | D |
| 257 482.791 | 143–133 | 157.0 | 1.41 | −59.20 (0.02) | 3.9 (0.1) | 0.52 (0.01) | 2.14 (0.03) | 1.69 (0.01) | D |
| 257 507.561 | 142–132 | 121.3 | 1.45 | −58.94 (0.09) | 3.7 (0.2) | 0.47 (0.03) | 1.84 (0.09) | 2.83 (0.05) | D |
| 257 522.427 | 141–131 | 99.8 | 1.47 | −58.74 (0.05) | 3.5 (0.1) | 0.53 (0.02) | 1.93 (0.06) | 2.92 (0.03) | PB |
| 257 527.383 | 140–130 | 92.7 | 1.48 | −58.89 (0.04) | 3.6 (0.1) | 0.48 (0.02) | 1.83 (0.05) | 2.74 (0.02) | PB |
Notes. (1) Frequencies. (2) Transition. (3) Energy of the upper level. (4) Einstein spontaneous emission coefficient. (5)–(8) Velocity, line width at half intensity, brightness temperature, and integrated intensities. The one sigma uncertainties are given in brackets. (9) Column densities of the upper state level of the transition with respect to the upper state degeneracy gu. (10) D: detected lines, B: blended lines and PB: partially blended lines.
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