Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS

U. Lammers; Lennart Lindegren; A. Bombrun; W. O'Mullane; David Hobbs

Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS

U. Lammers, Lennart Lindegren, A. Bombrun, W. O'Mullane, David Hobbs

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

Abstract

Gaia is ESA’s ambitious 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) - the mathematical and numerical framework for combining the ≍80 available observations per star obtained during Gaia’s 5yr lifetime into a single global astrometric solution. At last year’s ADASS XVIII we presented (O4.1) in detail the fundamental working principles of AGIS, its development status, and selected results obtained by running the system on processing hardware at ESAC, Madrid with large-scale simulated data sets. We present here the latest developments around AGIS highlighting in particular a much improved algebraic solving method that has recently been implemented. This Conjugate Gradient scheme improves the convergence behavior in significant ways and leads to a solution of much higher scientific quality. We also report on a new collaboration aiming at processing the data from the future small Japanese astrometry mission Nano-Jasmine with AGIS.

Original language	English
Title of host publication	Astronomical Society of the Pacific Conference Series
Editors	Yoshihiko Mizumoto, Koh-Ichiro Morita, Masatoshi Ohishi
Publisher	Astronomical Society of the Pacific (ASP)
Pages	309-312
Number of pages	4
Volume	434
ISBN (Print)	978-1-58381-748-3
Publication status	Published - 2010
Event	Astronomical Data Analysis Software and Systems XIX - Sapporo, Japan Duration: 2009 Oct 4 → …

Publication series

Name
Volume	434

Conference

Conference	Astronomical Data Analysis Software and Systems XIX
Country/Territory	Japan
City	Sapporo
Period	2009/10/04 → …

Subject classification (UKÄ)

Astronomy, Astrophysics and Cosmology

Access to Document

http://www.aspbooks.org/a/volumes/article_details/?paper_id=32153

Cite this

Lammers, U., Lindegren, L., Bombrun, A., O'Mullane, W., & Hobbs, D. (2010). Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS. In Y. Mizumoto, K.-I. Morita, & M. Ohishi (Eds.), Astronomical Society of the Pacific Conference Series (Vol. 434, pp. 309-312). Astronomical Society of the Pacific (ASP). http://www.aspbooks.org/a/volumes/article_details/?paper_id=32153

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title = "Faster, Better, Cheaper: News on Seeking Gaia{\textquoteright}s Astrometric Solution with AGIS",

abstract = "Gaia is ESA{\textquoteright}s ambitious 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) - the mathematical and numerical framework for combining the ≍80 available observations per star obtained during Gaia{\textquoteright}s 5yr lifetime into a single global astrometric solution. At last year{\textquoteright}s ADASS XVIII we presented (O4.1) in detail the fundamental working principles of AGIS, its development status, and selected results obtained by running the system on processing hardware at ESAC, Madrid with large-scale simulated data sets. We present here the latest developments around AGIS highlighting in particular a much improved algebraic solving method that has recently been implemented. This Conjugate Gradient scheme improves the convergence behavior in significant ways and leads to a solution of much higher scientific quality. We also report on a new collaboration aiming at processing the data from the future small Japanese astrometry mission Nano-Jasmine with AGIS.",

author = "U. Lammers and Lennart Lindegren and A. Bombrun and W. O'Mullane and David Hobbs",

year = "2010",

language = "English",

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editor = "Yoshihiko Mizumoto and Koh-Ichiro Morita and Masatoshi Ohishi",

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Lammers, U, Lindegren, L, Bombrun, A, O'Mullane, W & Hobbs, D 2010, Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS. in Y Mizumoto, K-I Morita & M Ohishi (eds), Astronomical Society of the Pacific Conference Series. vol. 434, Astronomical Society of the Pacific (ASP), pp. 309-312, Astronomical Data Analysis Software and Systems XIX, Sapporo, Japan, 2009/10/04. <http://www.aspbooks.org/a/volumes/article_details/?paper_id=32153>

Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS. / Lammers, U.; Lindegren, Lennart; Bombrun, A. et al.
Astronomical Society of the Pacific Conference Series. ed. / Yoshihiko Mizumoto; Koh-Ichiro Morita; Masatoshi Ohishi. Vol. 434 Astronomical Society of the Pacific (ASP), 2010. p. 309-312.

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

TY - GEN

T1 - Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS

AU - Lammers, U.

AU - Lindegren, Lennart

AU - Bombrun, A.

AU - O'Mullane, W.

AU - Hobbs, David

PY - 2010

Y1 - 2010

N2 - Gaia is ESA’s ambitious 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) - the mathematical and numerical framework for combining the ≍80 available observations per star obtained during Gaia’s 5yr lifetime into a single global astrometric solution. At last year’s ADASS XVIII we presented (O4.1) in detail the fundamental working principles of AGIS, its development status, and selected results obtained by running the system on processing hardware at ESAC, Madrid with large-scale simulated data sets. We present here the latest developments around AGIS highlighting in particular a much improved algebraic solving method that has recently been implemented. This Conjugate Gradient scheme improves the convergence behavior in significant ways and leads to a solution of much higher scientific quality. We also report on a new collaboration aiming at processing the data from the future small Japanese astrometry mission Nano-Jasmine with AGIS.

AB - Gaia is ESA’s ambitious 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) - the mathematical and numerical framework for combining the ≍80 available observations per star obtained during Gaia’s 5yr lifetime into a single global astrometric solution. At last year’s ADASS XVIII we presented (O4.1) in detail the fundamental working principles of AGIS, its development status, and selected results obtained by running the system on processing hardware at ESAC, Madrid with large-scale simulated data sets. We present here the latest developments around AGIS highlighting in particular a much improved algebraic solving method that has recently been implemented. This Conjugate Gradient scheme improves the convergence behavior in significant ways and leads to a solution of much higher scientific quality. We also report on a new collaboration aiming at processing the data from the future small Japanese astrometry mission Nano-Jasmine with AGIS.

M3 - Paper in conference proceeding

SN - 978-1-58381-748-3

VL - 434

SP - 309

EP - 312

BT - Astronomical Society of the Pacific Conference Series

A2 - Mizumoto, Yoshihiko

A2 - Morita, Koh-Ichiro

A2 - Ohishi, Masatoshi

PB - Astronomical Society of the Pacific (ASP)

T2 - Astronomical Data Analysis Software and Systems XIX

Y2 - 4 October 2009

ER -

Faster, Better, Cheaper: News on Seeking Gaia’s Astrometric Solution with AGIS

Abstract

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