Stuart Weston, Tim Natusch, Sergei Gulyaev
With the establishment of the AUT University 12m radio telescope at
Warkworth, New Zealand has now become a part of the international Very Long
Baseline Interferometry (VLBI) community. A major product of VLBI observations
are images in the radio domain of astronomical objects such as Active Galactic
Nuclei (AGN). Using large geographical separations between radio antennas, very
high angular resolution can be achieved. Detailed images can be created using
the technique of VLBI Earth Rotation Aperture Synthesis. We review the current
process of VLBI radio imaging. In addition we model VLBI configurations using
the Warkworth telescope, AuScope (a new array of three 12m antennas in
Australia) and the Australian Square Kilometre Array Pathfinder (ASKAP) array
currently under construction in Western Australia, and discuss how the
configuration of these arrays affects the quality of images. Recent imaging
results that demonstrate the modeled improvements from inclusion of the AUT and
first ASKAP telescope in the Australian Long Baseline Array (LBA) are
presented.
View original:
http://arxiv.org/abs/1110.5360
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