Open Access
Table 1
Properties of some line emissions and associated beam sizes and noise levels in 2023.
| Line | Frequency (GHz) | Eup | Aji | Beam size/PA | Noise |
|---|---|---|---|---|---|
| (GHz) | (K) | (Hz) | (mas2/°) | (mJy beam–1) | |
| Low frequency setup, A+B configuration (2023) | |||||
| SiO(ν=0,5–4) | 217.1049 | 31.26 | 5.20 × 10–4 | 244 × 142/38 | 5.2 |
| 29SiO(ν=0,5–4) | 214.3858 | 30.9 | 5.01 × 10–4 | 247 × 144/38 | 5.2 |
| 12CO(2–1) | 230.5380 | 16.6 | 6.91 × 10–7 | 228 × 132/37 | 5.5 |
| 13CO(2–1) | 220.3987 | 15.9 | 6.04 × 10–7 | 240 × 137/39 | 4.9 |
| High frequency setup, A-configuration (2023) | |||||
| SiO(ν=0, 6–5) | 260.5180 | 43.76 | 9.12 × 10–4 | 207 × 112/27 | 7.3 |
| SiO(ν=1, 6–5) | 258.7073 | 1812 | 9.90 × 10–4 | 207 × 112/27 | 7.3 |
| H12CN(3–2) | 265.8864 | 25.5 | 8.4 × 10–4 | 204 × 109/27 | 9.1 |
| H13CN(3–2) | 259.0118 | 24.9 | 7.7 × 10–4 | 211 × 113/28 | 7.3 |
| Si17O(6–5) | 250.7447 | 42.1 | 8.13 × 10–4 | 213 × 117/27 | 6.6 |
| CS(5–4) | 244.9356 | 35.3 | 3.0 × 10–4 | 215 × 120/27 | 6.5 |
Notes. In 2024, the beam is typically 467 × 278 mas2 FWHM at PA=43° and the noise level is ~8 mJy beam–1. Measured line emissions are listed in Table 3. Line parameters are from the CDMS (Müller et al. 2005).
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