Table A.7.
Parameters of all the 22 GHz H2O maser features detected around VLA1 (epoch 2020.82).
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maser | RAa | Deca | Zone | Peak | Vlsr | ΔvL | Pl | χ | ΔVib | TbΔΩb | PV | B|| | θc |
| feature | offset | offset | Intensity (I) | ||||||||||
| (mas) | (mas) | (Jy/beam) | (km/s) | (km/s) | (%) | (°) | (km/s) | (log K sr) | (%) | (mG) | (°) | ||
| VLA1.4.01 | -8.378 | -6.729 | - | 0.37 ± 0.02 | 19.03 | 0.55 | − | − | − | − | − | − | − |
| VLA1.4.02 | -5.894 | -3.410 | - | 114.86 ± 3.00 | 8.84 | 1.22 | 0.3 ± 0.1 | −67 ± 19 |
 |
 |
− | − |
 |
| VLA1.4.03 | -5.852 | -3.094 | - | 0.31 ± 0.03 | 25.91 | 3.36 | − | − | − | − | − | − | − |
| VLA1.4.04 | 0 | -2.228 | - | 0.44 ± 0.01 | 20.32 | 0.64 | − | − | − | − | − | − | − |
| VLA1.4.05 | 0 | 0 | - | 302.47 ± 2.59 | 9.87 | 0.97 | 0.1 ± 0.1 | −5 ± 15 |
 |
 |
− | − |
 |
| VLA1.4.06 | 38.271 | 40.607 | - | 1.79 ± 0.02 | 18.98 | 0.59 | − | − | − | − | − | − | − |
| VLA1.4.07 | 40.923 | 44.167 | - | 1.10 ± 0.03 | 26.01 | 3.43 | − | − | − | − | − | − | − |
| VLA1.4.08 | 43.786 | 43.541 | - | 0.25 ± 0.02 | 18.98 | 0.58 | − | − | − | − | − | − | − |
| VLA1.4.09 | 46.523 | 47.241 | - | 0.14 ± 0.02 | 26.35 | 4.20 | − | − | − | − | − | − | − |
| VLA1.4.10 | 46.817 | 47.165 | - | 160.64 ± 1.83 | 10.87 | 1.59 | − | − | − | − | − | − | − |
Notes.
The reference position is α2000 = 20h38m36s.43111 ± 0s.00009 and δ2000 = 42° 37′34″.34.8794 ± 0″.0009.
The best-fitting results obtained by using a model based on the radiative transfer theory of H2O masers for Γ + Γν = 1 s−1 S11a. The errors were determined by analyzing the full probability distribution function. For T ∼ 2704 K (Γν = 14 s−1) TbΔΩ has to be adjusted by adding +1.2 log K sr (Anderson & Watson 1993).
The angle between the magnetic field and the maser propagation direction is determined by using the observed Pl and the fitted emerging brightness temperature. The errors were determined by analyzing the full probability distribution function. The boldface indicates that |θ+ − 55°| < |θ− − 55°|, that is, the magnetic field is parallel to the linear polarization vector (see Sect. 2).
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