137 citations · 268 across the 8 of their papers we have counts for
5 papers · 1 filter
Solution intervals considered harmful: on the optimality of radio interferometric gain solutions
Ulrich Armel Mbou Sob, Hertzog Landman Bester, Oleg M. Smirnov +2
Solution intervals are often used to improve the signal-to-noise ratio during radio interferometric gain calibration. This work investigates how factors such as the noise level, in…
A practical preconditioner for wide-field continuum imaging of radio interferometric data
Hertzog L. Bester, Audrey Repetti, Simon Perkins +2
The celebrated CLEAN algorithm has been the cornerstone of deconvolution algorithms in radio interferometry almost since its conception in the 1970s. For all its faults, CLEAN is r…
Comparison of classical and Bayesian imaging in radio interferometry
Philipp Arras, Hertzog L. Bester, Richard A. Perley +4
CLEAN, the commonly employed imaging algorithm in radio interferometry, suffers from a number of shortcomings: in its basic version it does not have the concept of diffuse flux, an…
Radio Interferometric Calibration Using a Complex Student's t-distribution and Wirtinger Derivatives
Ulrich Armel Mbou Sob, Hertzog Landman Bester, Oleg Smirnov +2
Radio interferometric gain calibration can be biased by incomplete sky models and radio frequency interference, resulting in calibration artefacts that can restrict the dynamic ran…
Engineering and Science Highlights of the KAT-7 Radio Telescope
A. R. Foley, T. Alberts, R P. Armstrong +100
The construction of the KAT-7 array in the Karoo region of the Northern Cape in South Africa was intended primarily as an engineering prototype for technologies and techniques appl…