Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103..229h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, Jan. 1992, p. 229-233.
Astronomy and Astrophysics
Astronomy
11
Extragalactic Radio Sources, Position (Location), Southern Sky, Very Long Base Interferometry, Astrometry, Calibrating, Radio Spectra, Sky Surveys (Astronomy)
Scientific paper
Accurate radio positions with a precision of about 0.01 arcsec are reported for eight compact extragalactic radio sources south of -45-deg declination. The radio positions were determined using VLBI at 8.4 GHz on the 9589 km Tidbinbilla (Australia) to Hartebeesthoek (South Africa) baseline. The sources were selected from the Parkes Catalogue to be strong, flat-spectrum radio sources with bright optical QSO counterparts. Optical positions of the QSOs were also measured from the ESO B Sky Survey plates with respect to stars from the Perth 70 Catalogue, to an accuracy of about 0.19 arcsec rms. These radio and optical positions are as precise as any presently available in the far southern sky. A comparison of the radio and optical positions confirms the estimated optical position errors and shows that there is overall agreement at the 0.1-arcsec level between the radio and Perth 70 optical reference frames in the far south.
Bartel Norbert
Harvey Bruce R.
Jauncey David L.
Morabito David D.
Nicolson George Duncan
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