Fig. 3.

Wavelength dependence of polarization for six of the stars in the R-band sample (USNO-B1 identifiers shown in the legend). Debiased fractional linear polarization (p̂) measured in the Johnsons-Cousins B, V, R, and I bands (horizontal axis shows effective wavelength). For each star, a line shows the best-fit Serkowski law (Eq. (1), with K set to 1.15).
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