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Table 4

The predicted integrated intensities, maximum intensities, continuum levels, and optical depths for the six lowest rotational transitions of ortho-water.

Line ν FWHM Receiver 1014  T mb,max T cont τ max
(GHz) (′′) (K km s-1) (erg cm-2 s-1) (K) (mK)

110−101 556.936 39 HIFI 12.9 9.3 0.88 18 40
212−101 1669.905 13 HIFI/PACS 13.0 28 0.80 80 44
221−110 2773.985 8 PACS 0.6 2.4 0.06 90 3.9
221−212 1661.017 13 HIFI/PACS 1.8 3.8 0.13 80 0.3
303−212 1716.775 13 HIFI/PACS 2.3 5.4 0.15 80 0.5
312−221 1153.117 19 HIFI 0.1 0.2 0.01 65  <0.1
312−303 1097.365 20 HIFI 1.0 1.4 0.10 62  <0.1
321−212 3977.047 5 PACS 0.3 1.3 0.02 103 0.3

Notes. The maximum and integrated intensities are for the baselines subtracted spectra. The foreground absorption, visible in the observed H2O   (110−101) spectrum, is not considered in this table.

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