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Milliarcsecond-accurate Astrometry of 34 Southerm Hemisphere Radio Sources


Fey, AL and Ojha, R and Quick, JFH and Nicolson, GD and Lovell, JEJ and Reynolds, JE and Ellingsen, SP and McCulloch, PM and Johnston, KJ and Jauncey, DL and Tzioumis, AK, Milliarcsecond-accurate Astrometry of 34 Southerm Hemisphere Radio Sources, The Astronomical Journal, 132, (5) pp. 1944-1949. ISSN 0004-6256 (2006) [Refereed Article]

DOI: doi:10.1086/507991


Milliarcsecond-accurate radio positions in the International Celestial Reference Frame for 34 southern hemisphere extragalactic sources are reported. The positions are derived from Mark III/IV very long baseline interferometry observations made between 2004 August and 2006 April using radio telescopes located in Australia, South Africa, and Hawaii. Positions for 7 of the 34 sources have been reported previously by us but are reported here with significantly improved accuracy. These results supplement an ongoing project to increase the sky density of southern hemisphere sources in order to better define the International Celestial Reference Frame and to provide additional phase reference sources with accurate positions for use in astrophysical observations. Positions for all 34 sources are south of δ = -20° (positions for nine of the sources are south of δ = -60°) and have average formal uncertainties of 0.23 mas in α cos δ and 0.35 mas in δ. © 2006. The American Astronomical Society. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Lovell, JEJ (Dr Jim Lovell)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:McCulloch, PM (Professor Peter McCulloch)
ID Code:40619
Year Published:2006
Funding Support:Australian Research Council (LP0212077)
Web of Science® Times Cited:6
Deposited By:Physics
Deposited On:2006-08-01
Last Modified:2007-08-29

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