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Deep Astrometric Standards

Published online by Cambridge University Press:  01 October 2007

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
Corresponding
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Abstract

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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

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