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Table 1

Sightlines and continuum targets.

Target l b EB − Va Flux rmsb v N(HCO) N(c-C3H) N(CF+) N(H13CO+) N(C2H)
° ° mag Jy 10-3 km s-1 1012  cm-2 1011  cm-2 1011  cm-2 1011  cm-2 1013  cm-2

B0415+379 161.67 –8.82 1.65 3c 4–6 –1 3.38(0.01) 4.63(0.18) 7.9(1.6) 2.22 8.29
B2200+420 92.59 –10.44 0.32 15c 1.5–2 –1 0.85(0.02) 1.62(0.05) 4.0(0.7) 0.42 0.67
W49 43.17 0.01 2.5 7 40 4.86(0.32) 3.40 7.10
W49 43.17 0.01 2.5 7 51–66 14.8(0.5) 10.4

Notes.

(b)

see Sect. 2.2 concerning the channel-channel line/continuum rms in the spectral sweep;

(c)

approximate, derived from pointing scans assuming 6 Jy Kelvin-1.

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