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Table 2
Targeted transitions and beam sizes, beam coupling efficiencies, and spectral resolution of our IRAM 30 m, APEX SEPIA, and ALMA Band 6 observations.
| Transition | Frequency | Eu | Telescope | Beff | Δv | FWHM |
|---|---|---|---|---|---|---|
| (MHz) | (K) | (km s−1) | (″) | |||
| H2CO | ||||||
| 30,3 − 20,2 | 218222.192 | 10.5 | IRAM | 0.62 | 0.26 | 11 |
| 32,1 − 22,0 | 218760.066 | 57.6 | IRAM | 0.62 | 0.26 | 11 |
| 32,2 − 22,1 | 218475.632 | 57.6 | IRAM | 0.62 | 0.26 | 11 |
H CO |
||||||
| 30,3 − 20,2 | 212811.184 | 10.2 | ALMA | 0.75 | 0.09 | 5 – 8 |
| 31,2 − 21,1 | 219908.525 | 22.4 | IRAM | 0.62 | 0.26 | 11 |
| 31,3 − 21,2 | 206131.626 | 21.7 | APEX | 0.72 | 0.06 | 30 |
| HDCO | ||||||
| 30,3 − 20,2 | 192893.256 | 9.3 | APEX | 0.72 | 0.06 | 32 |
| 31,3 − 21,2 | 185307.113 | 16.9 | APEX | 0.72 | 0.06 | 34 |
| 32,1 − 22,0 | 193907.460 | 41.1 | APEX | 0.72 | 0.06 | 32 |
| 32,2 − 22,1 | 193391.605 | 41.1 | APEX | 0.72 | 0.06 | 32 |
| D2CO | ||||||
| 30,3 − 20,2 | 174413.115 | 8.4 | APEX | 0.72 | 0.07 | 36 |
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