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Table 1
Instrumental reference.
| Transitiona | Frequencyb | Wavelength | Energy | Observatory/ | Beam width | Efficiency | Reference |
|
ν0 (MHz) | λ0 (μm) | Eup/k (K) | Instrument | HPBW (′) | ηmb | |
|
|
|||||||
| 11−10 | 118750.341 | 2526 | 5.7 | Odin | 9.96 | 0.91 | Frisk et al. (2003) |
| 33−12 | 487249.264 | 616 | 26.4 | SWAS | 3.5 × 5.0 | 0.90 | Melnick et al. (2000) |
| HIFI | 0.73 | 0.757 | Roelfsema et al. (2012) | ||||
| 54−34 | 773839.512 | 388 | 60.7 | HIFI | 0.47 | 0.753 | Roelfsema et al. (2012) |
Notes.
(a)
An energy level diagram is provided by, e.g., Goldsmith et al. (2011).
(b)
Frequencies are from the JPL-cataloguehttp://spec.jpl.nasa.gov/cgi-bin/catform
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