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Implementation of the Global Parameters Determination in Gaia's Astrometric Solution (AGIS)

In English

Författare

Redaktör

  • Yoshihiko Mizumoto
  • Koh-Ichiro Morita
  • Masatoshi Ohishi

Summary, in English

Gaia is ESA’s space astrometry mission with a foreseen launch date in early 2012. Its main objective is to perform a stellar census of the 1000 Million brightest objects in our galaxy (completeness to V=20 mag) from which an astrometric catalog of micro-arcsec level accuracy will be constructed. A key element in this endeavor is the Astrometric Global Iterative Solution (AGIS). A core part of AGIS is to determine the accurate spacecraft attitude, geometric instrument calibration and astrometric model parameters for a well-behaved subset of all the objects (the ‘primary stars’). In addition, a small number of global parameters will be estimated, one of these being PPN γ. We present here the implementation of the algorithms dedicated to the determination of the global parameters.

Publiceringsår

2010

Språk

Engelska

Sidor

386-389

Publikation/Tidskrift/Serie

Astronomical Society of the Pacific Conference Series

Volym

434

Dokumenttyp

Konferensbidrag

Förlag

Astronomical Society of the Pacific (ASP)

Ämne

  • Astronomy, Astrophysics and Cosmology

Conference name

Astronomical Data Analysis Software and Systems XIX

Conference date

2009-10-04

Conference place

Sapporo, Japan

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 978-1-58381-748-3