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Celestial reference coordinate system of VLBI with US-Japan joint VLBI experiments

Published online by Cambridge University Press:  03 August 2017

Yukio Takahashi ,
Noriyuki Kawaguchi ,
Kosuke Heki ,
Hiroo Kunimori  and
Tetsuro Kondo
Yukio Takahashi
Affiliation:
Kashima Space Research Center, Radio Research Laboratory, Hirai 893-1, Kashima-cho, Ibaraki-ken, Japan
Noriyuki Kawaguchi
Affiliation:
Kashima Space Research Center, Radio Research Laboratory, Hirai 893-1, Kashima-cho, Ibaraki-ken, Japan
Kosuke Heki
Affiliation:
Kashima Space Research Center, Radio Research Laboratory, Hirai 893-1, Kashima-cho, Ibaraki-ken, Japan
Hiroo Kunimori
Affiliation:
Kashima Space Research Center, Radio Research Laboratory, Hirai 893-1, Kashima-cho, Ibaraki-ken, Japan
Tetsuro Kondo
Affiliation:
Kashima Space Research Center, Radio Research Laboratory, Hirai 893-1, Kashima-cho, Ibaraki-ken, Japan

Abstract

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The right ascension of 3C273B has been a reference of the celestial VLBI coordinate system. However it seems that 3C273B is inadequate for the reference because 3C273B has the jet component which was detected on long baselines in our experiments. We present the best reference source for celestial coordinate system. Next we estimated the source positions, taking the new reference radio source. The nutation and plate motion were considered in our analysis. We show the change of 3C273B position. The estimated source positions are compared with those given in GSFC source catalog (1985).

Type
I. Celestial Reference Systems
Information
Symposium - International Astronomical Union , Volume 128: Earth's Rotation and Reference Frames for Geodesy and Geodynamics , 1988 , pp. 83 - 89
Copyright
Copyright © Reidel 1988 

References

1. Readhead, A.C., et al., ‘Bent beams and the overall size of extragalactic radio sources’, Nature, Vol 276, P768, Dec. 1978.Google Scholar