Table 1
Observational parameters of the main detected lines.
| Freq. | HPBW (a) | Beff (a) | rms (b) | ||
|---|---|---|---|---|---|
| Species | Transition | (GHz) | (arcsec) | (%) | (mK) |
| HNC | 10,0–00,0 | 90.664 | 28.6 | 80 | 0.15 |
| HC3N | 10–9 | 90.979 | 28.5 | 80 | 0.15 |
| N2H+ | 1–0 | 93.173 | 27.8 | 80 | 0.14 |
| CCS | 78–67 | 93.870 | 27.6 | 80 | 0.15 |
| HC3N | 12–11 | 109.174 | 23.8 | 80 | 0.20 |
| SO | 32–21 | 109.252 | 23.7 | 80 | 0.20 |
| C18O | 1–0 | 109.782 | 23.6 | 80 | 0.22 |
| NH2D | 11,1–10,1 | 110.154 | 23.5 | 79 | 0.23 |
| 13CO | 1–0 | 110.201 | 23.5 | 79 | 0.24 |
| C18O | 2–1 | 219.560 | 10.5 | 58 | 0.15 |
| 13CO | 2–1 | 220.399 | 10.5 | 58 | 0.15 |
Notes. (a) The values of HPBW (half-power beam width), Feff (forward efficiency: 95% between 90 and 110 GHz, and 92% at 220 GHz) and Beff (beam efficiency) are taken from http://www.iram.es/IRAMES/mainWiki/Iram30mEfficiencies. (b) Rms noise level over the whole surveyed area. The rms is given at the nominal resolutions of the spectrometers used, as described in Sect. 2.
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