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Table 1

Lines observed in V838 Mon.

Line ν Eu Aud gu
(GHz) (K) (s−1)
34SO? 56−45 215.8399 34.38 1.26e–4 13
SO2 222,20−221,21 216.6433(a) 248.44 9.27e–5 45
H2S 22,0−21,1 216.7104(a) 83.98 4.87e–5 5
SiO 5−4 217.1049 31.26 5.20e–4 11
SO2 227,15−236,18 219.276 352.76 2.13e–5 45
SO 56−45 219.9494 34.98 1.34e–4 13
AlOH 7−6 220.3344(a) 42.30 6.18e–6 12
13CO? 2−1 220.3987(a) 15.87 6.08e–7 10
CO 2−1 230.538 16.60 6.91e–7 5
29SiS? 13−12 231.6267 77.82 2.10e–4 27

Notes. Frequencies (ν), upper energy levels (Eu), Einstein coefficients for spontaneousemission (Aud), and statistical weights (gu) are given. Question marks indicate uncertain identification. All transitions are withing the ground vibration level of the respective molecule. (a) Blended.

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