Reduced polarization degree, P_r, and its position vector, θ_r, as a function of wavelength for 12 C-complex asteroids taken at 17 epochs (Table 1). In each panel, the phase angle (α) at the time of observation is provided in the legend. Different colors were used for asteroids observed more than once. The curve with salmon-colored diamonds represents the binned polarization spectrum with the coarsest spectral resolution (an interval of ~20–40 nm).