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Analysis and Synthesis of Catalogues of Extragalactic Radio Sources

Published online by Cambridge University Press:  12 April 2016

H.G. Walter
H.G. Walter*
Affiliation:
Astronomisches Rechen-InstitutMönchhofstr. 12-14 D-6900 Heidelberg Fed. Rep.of Germany

Abstract

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Recent observation catalogues of extragalactic radio sources obtained by Very Long Baseline Interferometry agree in the mean to a few milliarcseconds (mas). Within this range the position differences show constant, linear and periodic offsets. To cast light on these offsets the differences between some of the representative observation catalogues are plotted. Especially, the periodic variations of declination differences of observation catalogues having significantly different epochs are tentatively explained by an uncertainty of the general precession in declination. In terms of the luni-solar precession this uncertainty is estimated to be of the order of −1to −2 mas per year.

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 127: Reference Systems , 1991 , pp. 376 - 380
Copyright
Copyright © United States Naval Observatory 1991

References

Fanselow, J.L., Sovers, O.J., Thomas, J.B., Purcell, G.H. Jr., Cohen, E.J., D.H., , Skjerve, L.J., Spitzmesser, D.J.: 1984, Astron. J. 89, 987 Google Scholar
Kaplan, G.H., Josties, F.J., Angerhofer, P.E., Johnston, K.J., Spencer, J.H.: 1982, Astron. J. 87, 570 CrossRefGoogle Scholar
Ma, C.: 1988, Radio sourde positions from Mark III VLBI, Catalogue GSFC 8805, GLB 250, Goddard Space Flight Center, 4pp.Google Scholar
Ma, C., Clark, T.A., Ryan, J.W., Herring, T.A., Shapiro, I.I., Corey, B.E., Hinteregger, H.F., Rogers, A.E.E., Whitney, A.R., Knight, C.A., Lundqvist, G.L., Shaffer, D.B., Vandenberg, N.R., Pigg, J.C., Schupler, B.R., Rönnäng, B.O.: 1986, Astron. J. 92, 1020 CrossRefGoogle Scholar
Ma, C., Shaffer, D.B., de Vegt, C., Johnston, K.J., Russell, J.L.: 1990, Astron. J. 99, 1284 CrossRefGoogle Scholar
Sovers, O.J.: 1989, Results of analysis of DSN VLBI experiments, Catalogue JPL 1989-3, revised on 20-Apr-1989, Jet Propulsion Laboratory, 5 pp.Google Scholar
Sovers, O.J., Edwards, C.D., Jacobs, C.S., Lanyi, G.E., Liewer, K.M. and Treuhaft, R.N.: 1988, Astron. J. 95, 1647 CrossRefGoogle Scholar
Wade, C.M., Johnston, K.J.: 1977, Astron. J. 82, 791 CrossRefGoogle Scholar
Walter, H.G.: 1990, Corrections to the luni-solar precession from radio positions of extragalactic objects, in: IAU Symposium No. 141, Inertial Coordinate Systems on the Sky, eds. Lieske, J.H. and Abalakin, V.K., Kluwer Acad. Publ., Dordrecht, p. 285 CrossRefGoogle Scholar