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Accurate Astrometry of 22 Southern Hemisphere Radio Sources


Fey, AL and Ojha, R and Jauncey, DL and Johnston, KJ and Reynolds, JE and Lovell, JEJ and Tzioumis, AK and Quick, JFH and Nicolson, GD and Ellingsen, SP and McCulloch, PM and Koyama, Y, Accurate Astrometry of 22 Southern Hemisphere Radio Sources, The Astronomical Journal, 127, (3) pp. 1791-1795. ISSN 0004-6256 (2004) [Refereed Article]

DOI: doi:10.1086/381957


Milliarcsecond-accurate radio positions for 22 southern hemisphere extragalactic sources are reported. These positions are derived from Mark III very long baseline interferometry observations made between 2003 February and 2003 August. The results presented here 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. The positions for all 22 sources are south of δ = -30° (positions for 10 of the sources are south of δ = -60°) and represent the largest group of new milliarcsecond-accurate astrometric positions for sources in this declination range since the initial definition of the International Celestial Reference Frame. The reported positions have average formal uncertainties of 0.5 mas in right ascension and 0.6 mas in declination.

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:30739
Year Published:2004
Web of Science® Times Cited:14
Deposited By:Physics
Deposited On:2004-08-01
Last Modified:2007-08-29

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