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Table 1
Spectrally resolved rotational transitions in the ground vibrational state of CO, SiO, and HCN used in this paper.
| Rotational | Frequency | E upper | Telescope | ∫Tmb dv | σ | η mb | Ref. |
| transition | [GHz] | [cm-1] | [K km s-1] | [K] | |||
|
|
|||||||
| CO | |||||||
| J = 1–0 | 115.270 | 3.85 | SEST | 4.83 | 0.03 | 0.70 | 5 |
| J = 2–1 | 230.537 | 11.54 | SEST | 44.14 | 0.14 | 0.50 | 5 |
| J = 2–1 | 230.537 | 11.54 | APEX | 36.94 | 0.04 | 0.75 | 1 |
| J = 3–2 | 345.796 | 23.07 | SEST | 62.41 | 0.29 | 0.25 | 5 |
| J = 3–2 | 345.796 | 23.07 | APEX | 59.25 | 0.03 | 0.73 | 1 |
| J = 4–3 | 461.042 | 38.45 | APEX | 72.31 | 0.09 | 0.60 | 1 |
| J = 6–5 | 691.474 | 80.74 | HIFI | 17.50 | 0.02 | 0.65 | 1 |
| J = 7–6 | 806.652 | 107.64 | HIFI | 16.60 | 0.01 | 0.625 | 1 |
| J = 10–9 | 1151.986 | 211.40 | HIFI | 18.50 | 0.06 | 0.59 | 4 |
| J = 13–12 | 1496.924 | 349.70 | HIFI | 14.62 | 0.12 | 0.58 | 3 |
| J = 16–15 | 1841.347 | 522.48 | HIFI | 22.76 | 0.13 | 0.58 | 4 |
| SiO | |||||||
| J = 2–1 | 86.847 | 4.35 | SEST | 9.56 | 0.02 | 0.75 | 2 |
| J = 3–2 | 130.269 | 8.69 | SEST | 23.96 | 0.05 | 0.65 | 2 |
| J = 5–4 | 217.105 | 21.73 | SEST | 29.10 | 0.14 | 0.55 | 2 |
| J = 5–4 | 217.105 | 21.73 | APEX | 35.72 | 0.02 | 0.75 | 1 |
| J = 6–5 | 260.518 | 30.42 | SEST | 34.57 | 0.20 | 0.45 | 2 |
| J = 6–5 | 260.518 | 30.42 | APEX | 42.88 | 0.03 | 0.75 | 1 |
| J = 7–6 | 303.927 | 40.55 | APEX | 41.32 | 0.01 | 0.73 | 1 |
| J = 8–7 | 347.331 | 52.14 | APEX | 41.32 | 0.05 | 0.73 | 1 |
| J = 9–8 | 390.729 | 65.17 | APEX | 52.20 | 0.04 | 0.60 | 1 |
| J = 10–9 | 434.120 | 79.65 | APEX | 58.28 | 0.24 | 0.60 | 1 |
| J = 12–11 | 520.881 | 112.96 | HIFI | 7.18 | 0.03 | 0.62 | 1 |
| J = 14–13 | 607.608 | 152.05 | HIFI | 6.99 | 0.07 | 0.62 | 1 |
| J = 16–15 | 694.294 | 196.92 | HIFI | 6.35 | 0.05 | 0.65 | 3 |
| J = 18–17 | 780.934 | 247.57 | HIFI | 7.01 | 0.12 | 0.65 | 1 |
| J = 25–24 | 1083.731 | 470.33 | HIFI | 6.69 | 0.12 | 0.635 | 1 |
| J = 28–27 | 1213.247 | 587.43 | HIFI | 5.92 | 0.10 | 0.59 | 1 |
| J = 35–34 | 1514.714 | 910.97 | HIFI | 6.58 | 0.14 | 0.58 | 1 |
| J = 38–37 | 1643.551 | 1071.14 | HIFI | 4.58 | 0.16 | 0.58 | 1 |
| HCN | |||||||
| J = 1–0 | 88.632 | 4.25 | SEST | 0.42 | 0.01 | 0.75 | 4 |
| J = 3–2 | 265.886 | 25.52 | APEX | 6.96 | 0.03 | 0.75 | 1 |
| J = 4–3 | 354.505 | 42.54 | APEX | 6.03 | 0.03 | 0.73 | 1 |
| J = 7–6 | 620.304 | 119.09 | HIFI | 2.24 | 0.07 | 0.62 | 1 |
| J = 13–12 | 1151.449 | 386.94 | HIFI | 2.21 | 0.07 | 0.59 | 3 |
Notes. The rest frequency, upper energy level, telescope, integrated main-beam temperature ∫Tmb dv, the noise rms of the continuum σ, and main-beam efficiency ηmb are listed as well.
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