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Fig. 7.


Caustic curves corresponding to the best-fitting model of Gaia16aye. The lens-source relative trajectory is shown by a black curve. The barycenter of the lens is at (0, 0) and the lens components are located along the x-axis at time t0, kep = 7675. Caustics are plotted at the times of caustic crossings; the large points are marked with respective colours. The inset shows a zoom on the trajectory of the Earth and Gaia at the moment of the caustic crossing around HJD′∼7714.

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