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Table 1

Source sample: properties and resulting continuum intensities and noise levels.

Source RA Dec Distance νLSRa l.o.sb T C c 1σ/TCd
(J2000) (J2000) (kpc) (km s-1) (km s-1) (K)

W 31C (G10.60.4) 18:10:28.7 –19:55:50 4.95e 3 10–61 5.6 0.015
W 49N (G43.20.1) 19:10:13.2 +09:06:12 11.1f +11 20–84 7.0 0.013
W 51 (G49.50.4) 19:23:43.9 +14:30:30.5 5.4g +57 1–45 6.7 0.011
G34.3+0.1 18:53:18.7 +01:14:58 3.3h +58 8–45 5.6 0.014

Notes.

(a)

Source LSR velocity.

(b)

LSR velocity range of foreground absorbing gas.

(c)

Single sideband (SSB) continuum intensity as measured in the Dual Beam Switch data.

(d)

Rms noise at a resolution of 1 km s-1 divided by TC.

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