Quasar link conditions for HIPPARCOS

Details Quasar link conditions for HIPPARCOS Quasar link conditions for HIPPARCOS

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...245..669b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 245, no. 2, May 1991, p. 669-675.

Astronomy and Astrophysics

Astrophysics

13

Hipparcos Satellite, Quasars, Extragalactic Radio Sources, Stellar Motions

Scientific paper

Fictitious proper motions of quasars and of their surrounding stars have been determined based on plates with epoch differences of up to 90 yrs. From the fact that the true proper motions of the quasar are vanishingly small, conditions are obtained for the extragalactic calibration of the preliminary Hipparcos system. Results are presented for the fields of 3C 273, OQ 208, 3C 371 and 3C 390.3. With these data it is possible to achieve the link with random errors smaller than 0.15 arcsec per century.

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