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Gaia: organisation and challenges for the data processing

Published online by Cambridge University Press:  01 October 2007

F. Mignard ,
C. Bailer-Jones ,
U. Bastian ,
R. Drimmel ,
L. Eyer ,
D. Katz ,
F. van Leeuwen ,
X. Luri ,
W. O'Mullane  and
X. Passot
...Show all authors
F. Mignard
Affiliation:
Observatoire de la Côte d'Azur, Nice, France email: [email protected]
C. Bailer-Jones
Affiliation:
Max Planck Institut für Astronomie, Heidelberg, Germany
U. Bastian
Affiliation:
Astronomisches Recheninstitut (ARI), Heidelberg, Germany
R. Drimmel
Affiliation:
Osservatorio Astronomico di Torino, Torino, Italy
L. Eyer
Affiliation:
Observatoire de l'Université de Genève, Sauverny, Switzerland
D. Katz
Affiliation:
Observatoire de Paris-Meudon, Meudon, France
F. van Leeuwen
Affiliation:
Institute of Astronomy, Cambridge, England
X. Luri
Affiliation:
University of Barcelona, Barcelona, Spain
W. O'Mullane
Affiliation:
European Space Astronomy Centre, Madrid, Spain
X. Passot
Affiliation:
Centre National d'Etudes Spatiales (CNES), Toulouse, France
D. Pourbaix
Affiliation:
Université Libre de Bruxelles, Brussels, Belgium
T. Prusti
Affiliation:
European Space Agency, ESTEC, Noordwijk, The Netherlands
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Abstract

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Gaia is an ambitious space astrometry mission of ESA with a main objective to map the sky in astrometry and photometry down to a magnitude 20 by the end of the next decade. While the mission is built and operated by ESA and an industrial consortium, the data processing is entrusted to a consortium formed by the scientific community, which was formed in 2006 and formally selected by ESA one year later. The satellite will downlink around 100 TB of raw telemetry data over a mission duration of 5 years from which a very complex iterative processing will lead to the final science output: astrometry with a final accuracy of a few tens of microarcseconds, epoch photometry in wide and narrow bands, radial velocity and spectra for the stars brighter than 17 mag. We discuss the general principles and main difficulties of this very large data processing and present the organization of the European Consortium responsible for its design and implementation.

Keywords

astrometryinstrumentation: photometerstechniques: spectroscopicmethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 224 - 230
Copyright
Copyright © International Astronomical Union 2008

References

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