Determination of the I → QUV crosstalk at 459 nm. Left to right: Stokes I, Q∕I, U∕I, and V∕I for a single, randomly picked profile. Top row: full spectrum. The two vertical lines indicate the location of the continuum wavelength window used in the determination of I → QUV. Bottom row: spectrum inside the continuum wavelength window. The horizontal solid and dashed lines indicate the average value in the continuum window and the full spectrum, respectively.