Left panel: a view of the 6.7-GHz CH₃OH maser features detected around IRAS 20126+4104, the reference position is and (see Sect. 4). Right panel: a view of the 22-GHz H₂O maser features detected around IRAS 20126+4104, the reference position is and (see Sect. 4). The triangles and the octagonal symbols are the identified CH₃OH and H₂O maser features, respectively, scaled logarithmically according to their peak flux density (Tables 1 and 2). The maser LSR radial velocity is indicated by color. (The systemic velocity of IRAS 20126+4104 is V_lsr = −3.5 km s^-1, MCR11.) A 3 Jy beam^-1 symbol is plotted for illustration in both panels. The linear polarization vectors, scaled logarithmically according to polarization fraction P_l, are overplotted. In the right bottom corner of both panels, the error-weighted orientation of the magnetic field (Φ_B, see Sect. 5.3) is also reported, the two dashed segments indicate the uncertainties. The two arrows indicate the direction but not the absolute position of the red- and blue-shifted lobes of the jet (PA_jet = 115°; MCR11). The dotted line is the best linear fit of the H₂O maser features (PA_H2O = 114°    ±    4°).