Within errors, this period is consistent with the light variability period determined by Adelman et al. Figure 13 shows the , previously quoted, phased with Kurtz's ephemeris. Wade et al. Vogt et al. Open triangles represent the photopolarimetric measurements by Landstreet et al.
Solid line represents a least-squares fit with a sine function.
Solid line represent a fit of Mathys et al. Phasing the measurements of CrB with the orbital period, data within 0.1 phase intervals have been phased with the orbital period and than fitted with a sine function. Left panel shows the amplitude A 1 and average value A 0 as a function of the orbital phase. Starting from the null value of the orbital phase, all the measurements within 0.1 phase intervals have been phased assuming the 18.4868 day rotational period. The left panel of Fig.