Motion of planets b and c around β Pictoris, as observed by GRAVITY (respectively red and green dots) and direct imaging (orange dots). The inset panels are zooms on the GRAVITY observations of β Pic c. Within the insets, the green ellipses correspond to the 1σ error intervals, typically between 100 to 200 μas, elongated because of the shape of the interferometric array. The white dots are the retrieved position at the time of observation from the posteriors in Table 3.
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