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Gaia astrometric science performance - post-launch predictions

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arxiv 1502.00791 v1 pith:OA2TARHT submitted 2015-02-03 astro-ph.IM

J.H.J. de Bruijne , K.L.J. Rygl , T. Antoja (Scientific Support Office , Directorate of Science , Robotic Exploration , European Space Research , Technology Centre (ESA/ESTEC) , Keplerlaan 1
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2201AZ Noordwijk The Netherlands)
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keywords gaiaprovidedrelationstandardanalyticalastrometricastrometrybeen
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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 as function of Gaia G magnitude (and V-I colour) which supersedes the pre-launch relation provided in de Bruijne (2012).

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