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Table B.1

CO and SiO integrated intensity values, and H2 level populations measured over a beam of 24′′ centred on the SiO knot position.

Observable Species Line SiO knot

(K km s-1) CO (3–2) 113.4 ± 17.0
CO (4–3) 117.3 ± 17.6
CO (6–5) 115.2 ± 17.3
CO (7–6) 95.2 ± 14.3
CO (11–10) 22.9 ± 3.4
CO (16–15) 3.4 ± 0.5
(K km s-1) SiO (5–4) 10.5 ± 1.1
SiO (6–5) 5.6 ± 0.6
SiO (8–7) 2.5 ± 0.3

Observable Species Level SiO knot

ln (N/g) H2 (0, 0) 43.5 ± 1.2
H2 (0, 1) 41.0 ± 1.3
H2 (0, 2) 40.3 ± 1.3
H2 (0, 3) 38.9 ± 1.4
H2 (0, 4) 38.2 ± 1.4
H2 (0, 5) 36.7 ± 1.4
H2 (0, 6) 35.7 ± 1.4
H2 (0, 7) 34.6 ± 1.5

Notes. This means that the CO (1615) (nominal resolution of 16.̋3) and SiO (nominal resolution of 28′′) data were a posteriori corrected assuming the emission is extended over the largest beam. As such, the initial data were multiplied by (16.3/24)2 and (28/24)2. The uncertainties are given. The integrated intensities were calculated between 4.5 and 50 km s-1. The CO and SiO integrated intensities correspond to a filling factor of 1.

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