Optical astrometry of benchmark radio sources.

Details Optical astrometry of benchmark radio sources. Optical astrometry of benchmark radio sources.

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...96..183c&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 96, no. 1, p. 183-189.

Astronomy and Astrophysics

Astrophysics

11

Astrometry, Extragalactic Radio Sources, Astronomical Catalogs, Celestial Reference Systems, Error Analysis, Very Long Base Interferometry

Scientific paper

Optical positions, relative to either the Perth70 or AGK3R catalogs, have been obtained for the optical counterparts of 26 extragalactic radio sources south of delta about + 12 deg. Most of these sources have been selected by IAU Commission 24 to be used as benchmark objects for the establishment of a high-precision radio/optical reference frame. Precision levels better than 0.2 arcsec in both coordinates were achieved. Comparisons with independent optical surveys and with the radio positions available for these sources are presented.

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