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Fig. 2.


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Proper motion (PM) vs. parallax (Plx) diagram from Gaia EDR3 for the objects with parallax errors < 0.1 mas within two degrees around VPMS J1708+4332. Red frames, quasars from SDSS DR16 (Ahumada et al. 2020); blue frames, quasar candidates from Richards et al. (2009); and blue asterisk, VPMS J1708+4332. For clarity, error bars have only been plotted for VPMS J1708+4332. The concentration of sources at log PM ∼ 0.75 is due to the globular cluster M 92.

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