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Gaia Astrometric Science Performance โ Post-Launch Predictions
The standard errors of the end-of-mission Gaia astrometry have been re-assessed after conclusion of the in-orbit commissioning phase of the mission. An analytical relation is provided for the parallax standard error ฯฯ as function of Gaia G magnitude (and V โ I colour) which supersedes the pre-launch relation provided in โฆ