Table 1
Observational parameters.
| Molecule/Line | Frequencya | Eup/k | θMB | ηMB | Receiver | PWV | Tsys |
| (MHz) | (K) | (′′) | (mm) | (K) | |||
|
|
|||||||
| C18O J = 3−2 | 329330.553 | 32 | 18.0 | 0.75 | APEX-2a | ~1.0 | 220 |
| 13CO J = 3−2 | 330587.965 | 32 | 18.0 | 0.75 | APEX-2a | ~1.0 | 210 |
| C18O J = 6−5 | 658553.278 | 111 | 9.0 | 0.47 | CHAMP+ | ≲0.7 | 1600 |
| 12CO J = 6−5 | 691473.076 | 116 | 8.6 | 0.47 | CHAMP+ | ≲0.5 | 1800 |
| 12CO J = 7−6 | 806651.806 | 155 | 7.4 | 0.45 | CHAMP+ | ≲0.5 | 3900 |
| 13CO J = 8−7 | 881272.808 | 190 | 6.7 | 0.45 | CHAMP+ | ≲0.7 | 3700 |
Notes. Columns are, from left to right, CO isotopologue and transition, frequency, energy of the transition’s upper energy level above the ground-state, the HPBW beam size, the main beam efficiency, the receiver used, the average precipitable water vapor column and the average system temperature during the observations.
Taken from the Cologne Database for Molecular Spectroscopy (CDMS, Müller et al. 2005)1.
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