Fig. 3
Gaia DR2 proper motions of stars within 4′ of OGLE-2012-BLG-1323 (left panel) and OGLE-2017-BLG-0560 (right panel). Blue contours correspond to the main-sequence stars (Galactic disk population) and red contours to giants (bulge population). Solid contours enclose 68 and 95% of all objects. The source is marked with a black dot. The black dashed circle corresponds to the relative source-lens proper motion of 5.6 mas yr−1 (left panel) and 15.6 mas yr−1 (right panel).
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