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Observations of QSOs and Reference Framewith GAIA

Published online by Cambridge University Press:  25 September 2002

F. Mignard*
Affiliation:
OCA/CERGA, avenue Copernic, 06130 Grasse, France
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Abstract

The astrometric mission GAIA will provide a flux limited census ofquasi stellar objects to V=20 mag. This paper addresses the mainphysical and observational properties of the quasars, the existingsurveys and the relevant statistical distributions of the compilationcatalogue of Véron-Cetty & Véron. Then I consider thedetection and recognition with GAIA which should be based on themulticolour photometry complemented by hints on the parallaxes andproper motions. In the last section I discuss the possibility tomaterialize directly in the optical the quasi-inertial frame to thesub-μas accuracy. It is shown that that with a clean sample of lessthan 10 000 quasars the residual spin of the GAIA reference framecan be determined to 0.5 μas yr-1.

Type
Research Article
Copyright
© EAS, EDP Sciences, 2002

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