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Quasar Link Conditions for Hipparcos1

  • P. Brosche (a1), C. Ducourant (a1), R. Galas (a1), M. Geffert (a1) and A. Karafistan (a1)...

Abstract

Fictitious proper motioms of quasars and of their surrounding stars have been determined based on plates with an epoch difference of up to 90 years. From the fact that the true proper motions of the quasar are vanishingly small, we obtain conditions for the extragalactic calibration of the preliminary Hipparcos system. We present results for the fields of 3C 273, OQ 208, 3C 371 and 3C 390.3. With the data it is possible to achieve the link with random errors smaller than 0₺ 15 per century.

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1

Accepted for publication in Astron.Astrophys., 1990.

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1 Accepted for publication in Astron.Astrophys., 1990.

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