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Gaia and the Astrometric Global Iterative Solution

Published online by Cambridge University Press:  01 October 2007

D. Hobbs ,
L. Lindegren ,
B. Holl ,
U. Lammers  and
W. O'Mullane
D. Hobbs
Affiliation:
Lund Observatory, Lund, Sweden email: david@astro.lu.se, lennart@astro.lu.se, berry@astro.lu.se
L. Lindegren
Affiliation:
Lund Observatory, Lund, Sweden email: david@astro.lu.se, lennart@astro.lu.se, berry@astro.lu.se
B. Holl
Affiliation:
Lund Observatory, Lund, Sweden email: david@astro.lu.se, lennart@astro.lu.se, berry@astro.lu.se
U. Lammers
Affiliation:
European Space Astronomy Center, ESA, Spain email: Uwe.Lammers@esa.int, william.omullane@esa.int
W. O'Mullane
Affiliation:
European Space Astronomy Center, ESA, Spain email: Uwe.Lammers@esa.int, william.omullane@esa.int
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Abstract

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Gaia is an ESA space astrometry mission due for launch in 2011–12. We describe part of the work carried out in the Gaia Data Processing and Analysis Consortium, namely the Astrometric Global Iterative Solution (AGIS) currently being implemented at the European Space Astronomy Center (ESAC) in Spain and largely based on algorithms developed at Lund Observatory. Some provisional results based on simulated observations of one million stars are presented, demonstrating convergence at microarcsec level independent of initial conditions.

Keywords

astrometrymethods: data analysismethods: numericalreference systems

References

Mignard, F., et al. 2008, this volume p.224Google Scholar