Fig. 2
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Orbital fits for HD 13931 b. Top: fit of the HD 13931 RV data corrected from the instrumental offset (V0). Bottom: fit of the HD 13931 astrometric acceleration in right ascension (left) and declination (right). The black points correspond to the measurements obtained with HIPPARCOS (1991.25) and Gaia (2016.0). In each plot, the black curve shows the best fit. The color bar indicates the log likelihood of the different fits plotted.
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