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Table 2.
List of the targeted H2O emission lines in quasars.
| Transition | νrest (1) | Eupper (2) | Log Aij (3) |
|---|---|---|---|
| (GHz) | (K) | (s−1) | |
| H2O 111 − 000 | 1113.343 | 61.0 | −1.73 |
| H2O 202 − 111 | 987.927 | 100.8 | −2.23 |
| H2O 211 − 202 | 752.033 | 136.9 | −2.15 |
| H2O 220 − 211 | 1228.789 | 195.9 | −0.58 |
| H2O 312 − 303 | 1097.365 | 249.4 | −1.78 |
| H2O 312 − 221 | 1153.127 | 249.4 | −2.57 |
| H2O 321 − 312 | 1162.912 | 305.2 | −1.64 |
| H2O 422 − 413 | 1207.639 | 454.3 | −1.55 |
Notes. (1)Rest frequency. (2)Energy of the upper level of the transition in units of the Boltzmann constant. (3)Base-10 logarithm of the Einstein A coefficient for spontaneous emission. Data are taken from Pickett et al. (1998).
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