Status of the International Celestial Reference Frame

Details Status of the International Celestial Reference Frame Status of the International Celestial Reference Frame

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..601f&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

International Celestial Reference System

Scientific paper

At the XXIII General Assembly of the IAU held on 20 August 1997 in Kyoto Japan the ICRF was adopted as the fundamental celestial reference frame. The ICRF is currently defined by the radio positions of 212 extragalactic objects obtained using the technique of Very Long Baseline Interferometry at frequencies of 2.3 and 8.4 GHz over the past 20+ years. The history of the development of the ICRF and its adoption by the IAU will be briefly discussed. In addition an overview of the current observing programs contributing to the maintenance and extension of the ICRF will be presented. Since its inception there have been two extensions to the ICRF. The primary objectives of these extensions were to provide positions for new sources and to refine the positions of candidate and other sources using additional observations.
The organization charged with the maintenance monitoring and extension of the ICRF in coordination with the International Earth Rotation Service the International VLBI Service and the IAU is the International Celestial Reference System Product Center. The various tasks of the Product Center and their implementation will be discussed.

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