Table 1
Observations used for the analysis of water line emission in the Orion Bar.
| Molecule | S (a) | Transition | ν (b) | Eup (b) | gup (c) | HPBW (d) | ηmb (d) | HIFI | Observing | tint (e) | Observation |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (GHz) | (K) | (″) | band | mode | (s) | Id. | |||||
 |
o | 110−101 | 556.936 | 60.96 | 9 | 37 | 0.62 | 1B | Load chop | 103.3 | 1342215923 (f) |
| 1A | Load chop | 126.3 | 1342218527 (g) | ||||||||
| 1B | On-the-fly | 4.0 | 1342215922 | ||||||||
| p | 111−000 | 1113.343 | 53.43 | 3 | 19 | 0.63 | 4B | Load chop | 105.8 | 1342217720 | |
| 4B | On-the-fly | 2.9 | 1342215970 | ||||||||
| o | 212−101 | 1669.905 | 114.38 | 15 | 12 | 0.58 | 6B | Fast DBS | 1274 | 1342229840 (h) | |
| 6B | Fast DBS | 134.6 | 1342218426 (i) | ||||||||
| 6B | On-the-fly | 4.0 | 1342251054 | ||||||||
| p | 202−111 | 987.927 | 100.85 | 5 | 21 | 0.64 | 4A | Load chop | 105.8 | 1342218628 | |
| 4A | On-the-fly | 2.9 | 1342218217 | ||||||||
| p | 211−202 | 752.033 | 136.94 | 5 | 28 | 0.65 | 2B | Load chop | 94.0 | 1342216378 | |
| 2B | On-the-fly | 3.9 | 1342190848 | ||||||||
| 2B | On-the-fly | 4.9 | 1342190849 | ||||||||
| 2B | On-the-fly | 2.9 | 1342203221 | ||||||||
| 2B | On-the-fly | 3.9 | 1342203222 | ||||||||
| o | 221−212 | 1661.008 | 194.09 | 15 | 13 | 0.58 | 6B | Fast DBS | 1274 | 1342229840 | |
| o | 312−303 | 1097.365 | 249.44 | 21 | 19 | 0.63 | 4B | Load chop | 105.8 | 1342217720 | |
 |
o | 110−101 | 547.676 | 60.46 | 9 | 38 | 0.62 | 1A | Freq. switch | 5278 | 1342205273 |
| 1A | On-the-fly | 3.96 | 1342216355 | ||||||||
| p | 111−000 | 1101.697 | 52.87 | 3 | 19 | 0.63 | 4B | Load chop | 105.8 | 1342217720 (j) | |
Notes. (a) Nuclear spin state, o stands for ortho and p for para. (b)Frequency of the transition (up-down) and rotational energy of the upper level in relation to the para 000 level from the HITRAN2016 database (Gordon et al. 2017). (c)Statistical weight of the upper level. (d)Half-power beam width and main-beam efficiency of the Herschel telescope, averaged between H and V polarizations, at the water line frequency (Mueller et al. 2014). (e) Integration time from FITS header. (f)Hereafter, this line is labeled 
110 − 101 -a. (g) Hereafter, this line is labeled 
110 − 101 -b. (h) Hereafter, this line is labeled 
212 − 101 -a.
(i) Hereafter, this line is labeled 
212 − 101 -b.
111 − 000 para line is not unambiguously detected.
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