Open Access

Fig. C.4


HIPPARCOS astrometry 3-σ detections in nine systems. Top panels: modelled astrometric orbits projected on the sky. North is up and east is left. The solid red line shows the model orbit and open circles mark the individual HIPPARCOS measurements. Bottom panels: O–C residuals for the normal points of the orbital solution (filled blue circles) and of the five-parameter model without companion (open squares).

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