The Gaia Project - technique, performance and status

Details The Gaia Project - technique, performance and status The Gaia Project - technique, performance and status

2008-11-14

arxiv.org/abs/0811.2345v1

Astron.Nachr.329:875,2008

Astronomy and Astrophysics

Astrophysics

six pages, invited talk at the conference "Galactic & Stellar Dynamics in the era of high resolution surveys", Strasbourg 16-2

Scientific paper

10.1002/asna.200811065

Gaia is a satellite mission of the ESA, aiming at absolute astrometric measurements of about one billion stars (all stars down to 20th magnitude, with unprecedented accuracy. Additionally, magnitudes and colors will be obtained for all these stars, while radial-velocities and spectral properties will be determined only for bright objects (V<17.5). At 15th magnitude Gaia aims at an angular accuracy of 20 microarcseconds (muas). This goal can only be reached if the geometry of the telescopes, the detectors, and the pointing of Gaia at each moment ("attitude") can be inferred from the Gaia measurements itself with muas accuracy.

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