327 citations · 1.7k across the 47 of their papers we have counts for
6 papers · 1 filter
Frequency Phase Transfer for Future Millimetre Arrays with Arbitrary Frequency Ratios
Senkhosi Simelane, Athol Kemball, Roger Deane
Non-dispersive tropospheric turbulence-induced phase delays enforce significant, often dominant, limitations to the imaging fidelity and dynamic range in (sub-)millimetre astronomy…
Efficient Exoplanet Imaging Simulations of the Habitable Worlds Observatory
Jamila Taaki, Farzad Kamalabadi, Athol Kemball +2
Direct imaging simulations of starshades and other proposed mission concepts are needed to characterize planet detection performance and inform mission design trades. In order to a…
Evaluation of South African Candidate Sites for an Expanded Event Horizon Telescope
Senkhosi Simelane, Roger Deane, Athol Kemball +5
Global expansion of the Event Horizon Telescope (EHT) will see the strategic addition of antennas at new geographical locations, transforming the sensitivity and imaging fidelity o…
Polarized Maser Emission with In-Source Faraday Rotation
Taylor L. Tobin, Malcolm D. Gray, Athol J. Kemball
We discuss studies of polarization in astrophysical masers with particular emphasis on the case where the Zeeman splitting is small compared to the Doppler profile, resulting in a…
Circular polarization measurement in millimeter-wavelength spectral-line VLBI observations
A. J. Kemball, L. Richter
This paper considers the problem of accurate measurement of circular polarization in imaging spectral-line VLBI observations in the lambda=7 mm and lambda=3 mm wavelength bands. Th…
Further evaluation of bootstrap resampling as a tool for radio-interferometric imaging fidelity assessment
Athol Kemball, Adam Martinsek, Modhurita Mitra +1
We report on a broader evaluation of statistical bootstrap resampling methods as a tool for pixel-level calibration and imaging fidelity assessment in radio interferometry. Pixel-l…