Optical positions of 221 radio stars obtained with the Bordeaux automatic meridian circle

Details Optical positions of 221 radio stars obtained with the Bordeaux automatic meridian circle Optical positions of 221 radio stars obtained with the Bordeaux automatic meridian circle

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...89..311r&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 89, no. 2, Aug. 1991, p. 311-318.

Astronomy and Astrophysics

Astrophysics

30

Position (Location), Radio Stars, Transits, Accuracy, Error Analysis, Space Observations (From Earth)

Scientific paper

From 1984 to 1990 the Bordeaux automatic meridian circle was used to determine accurate J2000 positions of 221 radio stars. The observations were strictly differential, a convenient number of FK5 stars being used each night to calculate the instrumental parameters. The mean positions were corrected for chromatic refraction and also for photocenter effect in the case of duplicity. The asymptotic accuracy is expected to be about 0.05 arcsec for the Northern stars with a number of observations greater than 25. Mean position of 3C273B is also given from 35 measurements obtained in the same conditions.

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