Intrinsic Stokes parameters of the polarization of A0620−00 in quiescence measured in different filters from the K_s to B, as indicated by letters near each data point. The light blue circle at the origin illustrates the possible uncertainty of the IS polarization with wavelength, σ_is, λ; the light red circle shows the systematic error on the IS polarization zero point, σ_is, sys. The red and blue arrows indicate the intrinsic polarization vector directions in the K_s and B bands, respectively. The dashed curved arrow shows the track left by the intrinsic polarization vector during its rotation from the IR to the blue part of the spectrum. An orange star shows the polarization of A0620−00 in V measured during the 1975 outburst by Dolan (1976).