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Table 2

Principle lines observed with HIFI.

Species Transition Rest frequencya Eu/kb A ul b n cr c η mb d θmb e WBS resolution HRS resolution Obs. timef Det.g
(GHz) (K) (s-1) (cm-3) (H/V) (′′) ( km s-1) ( km s-1) (min)

o-H2O 110–101 556.93599 61.0 3.46 × 10-3 1 × 107 0.62/0.62 38.1 0.27 0.03 38 39/46
312–221 1153.12682 249.4 2.63 × 10-3 8 × 106 0.59/0.59 18.4 0.13 0.06 13 7/46

p-H2O 111–000 1113.34301 53.4 1.84 × 10-2 1 × 108 0.63/0.64 19.0 0.13 0.06 28 28/46
202–111 987.92676 100.8 5.84 × 10-3 4 × 107 0.63/0.64 21.5 0.15 0.07 36 25/46

o-HO 110–101 547.67644 60.5 3.29 × 10-3 1 × 107 0.62/0.62 38.7 0.27 0.07 38 1/46

p-HO 111–000 1101.69826 52.9 1.79 × 10-2 1 × 108 0.63/0.64 19.0 0.13 0.06 28 0/46

C18O 98 987.56038 237.0 6.38 × 10-5 2 × 105 0.63/0.64 21.5 0.15 0.07 36 4/46
CO 109 1151.98545 304.2 1.01 × 10-4 3 × 105 0.59/0.59 18.4 0.13 0.06 13 40/46
13CO 109 1101.34966 290.8 8.86 × 10-5 3 × 105 0.63/0.64 19.3 0.13 0.06 28 20/46

Notes.

(a)

Taken from the JPL database (Pickett et al. 2010).

(b)

Taken from Daniel et al. (2011) and Dubernet et al. (2009) for H2O, the JPL database (Pickett et al. 2010) for HO and CO isotopologues.

(c)

Calculated for T = 300 K.

(e)

Calculated using Eq. (3) from Roelfsema et al. (2012).

(f)

Total time including on+off source and overheads.

(g)

Number of detections. Due to contamination of the reference positions, the status for observations of W40 sources 01, 03 and 06 cannot be determined.

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