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Deep Astrometric Standards

Published online by Cambridge University Press:  01 October 2007

I. Platais ,
A. L. Fey ,
S. Frey ,
S. G. Djorgovski ,
C. Ducourant ,
Ž. Ivezić ,
A. Rest ,
C. Veillet ,
R. F. G. Wyse  and
N. Zacharias
I. Platais
Affiliation:
Johns Hopkins University, Department of Physics & Astronomy, Baltimore, MD 21218, USA email: imants@pha.jhu.edu, wyse@pha.jhu.edu
A. L. Fey
Affiliation:
US Naval Observatory, Washington DC, USA
S. Frey
Affiliation:
FöMI Satellite Geodetic Observatory, Hungary
S. G. Djorgovski
Affiliation:
Caltech, Pasadena, CA 91125, USA
C. Ducourant
Affiliation:
Observatoire de Bordeaux, Floirac, France
Ž. Ivezić
Affiliation:
University of Washington, Seattle, WA 98155, USA
A. Rest
Affiliation:
Harvard University, Cambridge, MA 02138, USA
C. Veillet
Affiliation:
CFHT, Kamuela, HI 96743, USA
R. F. G. Wyse
Affiliation:
Johns Hopkins University, Department of Physics & Astronomy, Baltimore, MD 21218, USA email: imants@pha.jhu.edu, wyse@pha.jhu.edu
N. Zacharias
Affiliation:
US Naval Observatory, Washington DC, USA
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Abstract

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The advent of next-generation telescopes with very wide fields-of-view creates a need for deep and precise reference frames for astrometric calibrations. The Deep Astrometric Standards (DAS) program is designed to establish such a frame, by providing absolute astrometry at the 5–10 mas level in four 10 deg2 Galactic fields, to a depth of V=25. The source of our basic reference frame is the UCAC2 catalog, significantly improved by additional observations, and new VLBI positions of radio-loud and optically visible QSOs. We describe all the major steps in the construction of the DAS fields and provide the current status of this project.

Keywords

astrometrycatalogs
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. 320 - 323
Copyright
Copyright © International Astronomical Union 2008

References

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