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Fig. 3.


Passband solution for Hp. Upper panel: parallel and estimated orthogonal components, p and p, shown as red and blue curve, respectively. The thick solid line is the sum p. The dashed line shows the initial passband pini, which was used for estimating the orthogonal component. Middle and lower panels: relative flux residuals of the calibration stars vs. HIPPARCOS magnitude and vs. Johnson B − V colour, respectively. The highlighted areas indicate a range of one standard variations.

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