Intermediate results are reported from a program of VLBI radio observations designed to establish a link between the rotating reference frame of the ESA Hipparcos astrometric satellite and the extragalactic VLBI frame being developed by the International Earth Rotation Service. A group of 12 link stars have been observed at various epochs since 1982, and more observations are being undertaken during the 3-yr Hipparcos mission (1989-1992). Analysis of data on Algol indicates that phase-reference VLBI can determine an expected sky displacement of 4 marcsec with an uncertainty of 0.5 marcsec, even when the activity is only a few mJy.


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    Titel :

    VLBI astrometry and the Hipparcos link to the extragalactic reference frame


    Beteiligte:
    Lestrade, J.-F. (Autor:in) / Preston, R. A. (Autor:in) / Gabuzda, D. C. (Autor:in) / Phillips, R. B. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1991-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    VLBI astrometry and the Hipparcos link to the extragalactic reference frame

    Lestrade, J.-F. / Preston, R.A. / Gabuzda, D.C. et al. | Elsevier | 1991


    Groundbased optical and radio astrometry of Hipparcos extragalactic link objects

    de Vegt, Chr. / Zacharias, N. / Johnston, K.J. | Elsevier | 1991


    Hipparcos Extragalactic Link: the Potsdam Contribution

    Hirte, S. / Schilbach, E. / Scholz, R.-D. | British Library Online Contents | 1997


    Connection of the Hipparcos Catalogue to the Extragalactic Reference Frame

    Kovalevsky, J. | British Library Online Contents | 1997


    The HIPPARCOS space astrometry mission

    Perryman, M.A.C. | Elsevier | 1983