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News on Seeking Gaia’s Astrometric Core Solution withAGIS

Published online by Cambridge University Press:  15 February 2011

C. Turon ,
F. Meynadier ,
F. Arenou ,
U. Lammers  and
L. Lindegren
U. Lammers
Affiliation:
European Space Astronomy Centre of ESA, Madrid, Spain
L. Lindegren
Affiliation:
Lund Observatory, Lund, Sweden
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Abstract

We report on recent new developments around the Astrometric Global Iterative Solutionsystem. This includes the availability of an efficient Conjugate Gradient solver and theGeneric Astrometric Calibration scheme that had been proposed a while ago. The number ofprimary stars to be included in the core solution is now believed to be significantlyhigher than the 100 Million that served as baseline until now. Cloud computing servicesare being studied as a possible cost-effective alternative to running AGIS on dedicatedcomputing hardware at ESAC during the operational phase.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 45: GAIA: At the Frontiers of Astrometry , 2010 , pp. 123 - 126
Copyright
© EAS, EDP Sciences 2011

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References

Références

Bombrun A., Lindegren L., Holl B., et al., 2010, Astronomy & Astrophysics, in preparation
Lindegren L., October, 2008, Technical note GAIA-C3-TN-LU-LL-077, available at URL www.rssd.esa.int/doc_fetch.php?id=2865239, http://www.rssd.esa.int/doc_fetch.php?id=2865239