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Table 1
Parameters of main spectral lines.
| Line | Freq. | El/k | Δν | ncrita |
| (GHz) | (K) | (kHz) | ( ) |
|
|
|
||||
| NH3(1, 1) | 23.694506 | 22 | 15.625 | 2 |
| NH3(2, 2) | 23.722634 | 63 | 15.625 | 2 |
| NH3(3, 3) | 23.870130 | 122 | 15.625 | 2 |
| NH3(4, 4) | 24.139417 | 199 | 31.25 | 2 |
| NH3(5, 5) | 24.532989 | 294 | 31.25 | 2 |
| NH3(6, 6) | 25.056025 | 407 | 31.25 | 2 |
| NH3(7, 7) | 25.715182 | 537 | 31.25 | b |
| CH3OH(22,0−21,1) | 24.934382 | 28 | 31.25 | 36 |
| CH3OH(32,1−31,2) | 24.928715 | 35 | 31.25 | 40 |
| CH3OH(42,4−41,3) | 24.933468 | 44 | 31.25 | 31 |
| CH3OH(62,4−61,5) | 25.018123 | 70 | 15.625 | 29 |
| CH3OH(72,5−71,6) | 25.124872 | 86 | 15.625 | 32 |
| CH3OH(92,7−91,8) | 25.541398 | 126 | 31.25 | 34 |
| CH3OH(102,8−101,9) | 25.878266 | 149 | 31.25 | 32 |
Notes. Parameters are rest frequency (Müller et al. 2001; Lovas 2004), lower level energy El/k, spectral resolution Δν, and critical density 
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