Fig. 5.

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Gaia EDR3 proper motions of bulk of the objects in the direction of NGC 2244 (grey dots). Black dots mark the proper motions of 688 candidate members from Bell et al. (2013, B13) and Meng et al. (2017, M17) (upper left), OB stars (upper right), strong Hα emitters from VIMOS spectroscopy (lower left), and objects bright in Hα from photometry (lower right). The orange ellipse marks the proper motion selection criterion for the construction of the member training set. The mean proper motion uncertainty is shown in the lower right corner of each panel.
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