Table 1
Properties of the lines detected in the 843 μm correlator setup.
| Molecule | Transition | Frequency | Eu∕kB | σ(a), (b) |
|---|---|---|---|---|
| [GHz] | [K] | [mJy beam−1] | ||
| HCN | 4–3 | 354.505 | 42.5 | 24 |
| HCN;v2 = 1 | 4–3, l = 1e | 354.460 | 1066.9 | 85 |
| HC3N | 39–38 | 354.697 | 340.5 | |
| SO2 | 124,8–123,9 | 355.046 | 110.9 | 29 |
| SO2 | 157,9–166,10 | 356.040 | 230.4 | |
| HC3N;v7 = 1 | 39–38, l = 1f | 356.072 | 662.7 | 25 |
| HCN;v2 = 2 | 4–3, l=2f | 356.135 | 2095.2 | |
| HCN;v2 = 2 | 4–3, l = 2e | 356.163 | 2095.2 | |
| HCN;v2 = 1 | 4–3, l = 1f | 356.255 | 1067.2 | 60 |
| HCO+ | 4–3 | 356.734 | 42.8 | |
| SO2 | 104,6–103,7 | 356.755 | 89.8 |
Notes. Frequencies and upper energy levels are taken from the Cologne Database of Molecular Spectroscopy (CDMS, Müller et al. 2005). For HCN;v2 = 1 4–3, l = 1e and SO2 124,8 –123,9 these data are taken from the Jet Propulsion Laboratory database (Pickett et al. 1998). (a)The rms is calculated per velocity channel. For the vibrationally excited HCN lines the channel width is 0.5 km s−1, for the other lines it is 2 km s−1. (b)The rms is only given for the brightest lines which are individually imaged and presented in Fig. 4. For the remaining lines detected in the low spectral resolution band but not individually imaged, the rms noise is 3.4 mJy beam−1.
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