Table B.1
Transitions for the fitting: CH3OH.
| Rest frequency (MHz) | Transition | Eup (K) | Aij (s−1) | upper state degeneracy | τ1comp. | Gau. fitting/stacked | uv-space center | S/N |
|---|---|---|---|---|---|---|---|---|
| 215418.3060 | 149–1510 | 1295.6 | 3.29e-05 | 29 | 0.018 | – | – | 2.2 |
| 216945.6000 | 51,4–42,3 | 55.9 | 1.21e-05 | 44 | 2.247 | yes | yes | 58.5 |
| 218440.0500 | 42,3–31,2 | 45.5 | 4.69e-05 | 36 | 7.334 | yes | yes | 64.8 |
| 219983.6610 | 253,..–244,.. | 802.2 | 2.04e-05 | 200 | 0.641 | yes | yes | 24.0 |
| 219993.6380 | 235,..–226,.. | 775.9 | 1.75e-05 | 190 | 0.585 | yes | yes | 22.4 |
| 220078.5190 | 80,8–71,6 | 96.6 | 2.52e-05 | 68 | 5.862 | yes | yes | 57.8 |
| 230817.6590 | 186,..–187,.. | 987.6 | 3.13e-06 | 150 | 0.030 | – | – | 4.5 |
| 230820.1620 | 309,–3111, | 1757.7 | 5.29e-08 | 240 | 0.000 | – | – | blend |
| 230820.1620 | 309,–3111, | 1757.7 | 5.29e-08 | 240 | 0.000 | – | – | blend |
| 234683.3900 | 42,3–51,4 | 60.9 | 1.87e-05 | 36 | 2.379 | yes | – | 57.8 |
Notes. The transitions used for LTE model fitting. Column 1-5: The transition information obtained from CDMS using the XCLASS task ListDatabase. Column 6: Optical depths derived from the one-component LTE model fitting, which are also shown in Fig. B.7. Column 7: The transitions that are used in the Gaussian fitting (Fig. 4) and the stacked process (Fig. A.1). Column 8: The transitions used for 2D Gaussian fitting in the uv-space for the emitting centers in Fig. 5. Column 9: The signal to noise ratio obtained given the peak pixel value at the resolution of ~ 0.08 km s−1. “blend” indicates that the transition is blended with nearby transitions of the same molecule, for which we only list one S/N for the group (see Fig. B.1).
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