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Table 1
Summary of observed/imaged lines.
| Facility | Line or continuum | Frequency | Angular resolution | Imaged spectral | Sensitivity |
| (GHz) | (arcsec) | resolution (km s-1) | (mJy beam-1) | ||
|
|
|||||
| SMA | SiO (5–4) | 217.105 | 4.4 × 2.9, PA 0.7° | 2, 5 | 68, 48 |
| SMA | H2CO 3(0, 3)–2(0, 2) | 218.222 | 4.3 × 2.9, PA – 1.0° | 2, 5 | 70, 50 |
| SMA | CH3OH 4(2, 2)–3(1, 2)-E | 218.440 | 4.3 × 2.9, PA – 1.1° | 2, 5 | 76, 56 |
| SMA | H2CO 3(2, 2)–2(2, 1) | 218.476a | |||
| SMA | H2CO 3(2, 1)–2(2, 0) | 218.760 | 4.3 × 2.9, PA – 1.0° | 2, 5 | 65, 43 |
| SMA | C18O (2–1) | 219.560 | 4.3 × 2.9, PA 1.0° | 2, 5 | 74, 54 |
| SMA | HNCO 10(0, 10)–9(0, 9) | 219.798 | 4.3 × 2.9, PA 0.7° | 2, 5 | 67, 46 |
| SMA | SO 6(5)–5(4) | 219.949 | 4.3 × 2.9, PA 1.0° | 2, 5 | 68, 47 |
| SMA | 13CO (2–1) | 220.399 | 4.2 × 2.9, PA 0.7° | 2, 5 | 240, 220 |
| SMA | CH3OH 8(–1, 8)–7(0, 7)-E | 229.759 | 4.3 × 2.7, PA 3.6° | 2, 5 | 74, 51 |
| SMA | 12CO (2–1) | 230.538 | 4.3 × 2.7, PA 4.4° | 2, 5 | 890, 890 |
| SMA | 4 GHz continuum | 216.9–220.9 | 4.3 × 2.9, PA – 1.1° | 2.5 | |
| SMA | 4 GHz continuum | 228.9–232.9 | 4.3 × 2.7, PA 4.0° | 2.5 | |
| IRAM 30 m | 13CO (2–1) | 220.399 | 11.8 | 2, 5 | 2500, 1600 |
| IRAM 30 m | 12CO (2–1) | 230.538 | 11.2 | 2, 5 | 6000, 5000 |
| SMA + IRAM 30 m | 13CO (2–1) | 220.399 | 4.2 × 2.9, PA 0.7° | 2, 5 | 200, 140 |
| SMA + IRAM 30 m | 12CO (2-1) | 230.538 | 4.3 × 2.7, PA 4.4° | 2, 5 | 500, 500 |
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