Total intensity (I, black solid line) and linear polarization intensity (red solid line) spectra of the CH₃OH maser features M05, M18, and M24, and of the H₂O maser feature W02 (upper panel). The linear polarization intensity spectra have been multiplied by a factor of five for the M05, M18, and M24, and by a factor of fifteen for W02. The spectra of polarization fraction (black solid line, left scale) and polarization angle (dashed black line, right scale) are also shown (lower panel).