Stokes IV example spectra for a wavelength range of 10 Å near 5250 Å. The vertical axis is relative intensity, and the horizontal axis is wavelength in Angstroms. Top: Stokes-I spectra of ξ Boo A (blue) and ξ Boo B (red). Bottom: Stokes-V spectra of ξ Boo A (blue) and ξ Boo B (red), the latter offset by −0.2 in intensity for better visualization, and both enhanced in scale by a factor 20 compared to Stokes I.