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A strategy for astrometric quasar selection with Gaia DR3 and its application to discover new luminous $z>2$ quasars
We aim to provide a cookbook for purely astrometric selection of quasars with Gaia DR3 and to provide an example of its use for the identification of very luminous $z>2$ quasars. We analyse the Gaia DR3 astrometry of confirmed quasars and stationary sources. We show that the proper motion signal to
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