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Fig. 4.


HST proper motions, corrected to the mean GC PM shown in Table 2. The full set of HST stars is shown in blue, while the subset obtained after applying the low PM error cut (Sect. 5.1.1) are shown in red. The dashed green circle represents the very liberal hard cut on PMs to remove Milky Way field stars and the green cross highlights the mean PM presented in Table 2.

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