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On the Hipparcos Link to the ICRF derived from VLA and MERLIN radio astrometry

Walter, H. G.; Hering, R.

Positions and proper motions obtained from observations by the very large array (VLA) and the multi-element radio-linked interferometer network (MERLIN) are used to establish the link of the Hipparcos Celestial Reference Frame (HCRF) to the International Celestial Reference Frame (ICRF). The VLA and MERLIN data are apparently the latest ones publi…