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Astrometry of 25 Southern Hemisphere Radio Sources from a VLBI Short-Baseline Survey


Fey, AL and Ojha, R and Reynolds, JE and Ellingsen, SP and McCulloch, PM and Jauncey, DL and Johnston, KJ, Astrometry of 25 Southern Hemisphere Radio Sources from a VLBI Short-Baseline Survey, The Astronomical Journal, 128, (5) pp. 2593-2598. ISSN 0004-6256 (2004) [Refereed Article]

DOI: doi:10.1086/424941


Milliarcsecond-accurate radio positions for 25 southern hemisphere extragalactic sources are reported. These positions are derived from Mark III Very Long Baseline Interferometry observations made between 2003 September and 2004 May on the intra-Australia baseline connecting Hobart, Tasmania and Parkes, New South Wales. The results presented here represent an ongoing program intended to increase the number of phase-reference sources with accurate positions in the southern hemisphere for use in astrophysical observations. The positions for all but 1 of the 25 sources are south of δ = -45° and have average formal uncertainties of 3 mas in α cos δ and 2 mas in δ. As the reported positions are in the frame of the International Celestial Reference Frame (ICRF), the results reported here can also be used to increase the sky density of southern hemisphere ICRF sources, although with reduced accuracy.

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:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:McCulloch, PM (Professor Peter McCulloch)
ID Code:30812
Year Published:2004
Web of Science® Times Cited:13
Deposited By:Physics
Deposited On:2004-08-01
Last Modified:2005-04-15

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