Full polarisation spectra of the OH 1665 MHz (left) and 1667 MHz (right) maser lines of G107 taken on March 9, 2017 (MJD 57 821). Spectra of the Stokes I, LHC, RHC, Stokes V, degree of circular polarisation (m_C), Stokes Q, U, linearly polarised flux density (p), degree of linear polarisation (m_L), and polarisation position angle χ are shown from top to bottom. In the top left panel the Stokes I spectra of CH₃OH (red dotted line) and H₂O (blue dottedline) maser lines divided by a factor of 50 and 200, respectively, are added.