161 citations · 1.2k across the 38 of their papers we have counts for
11 papers · 1 filter
Africanus IV. The Stimela2 framework: scalable and reproducible workflows, from local to cloud compute
Oleg M. Smirnov, Sphesihle Makhathini, Jonathan S. Kenyon +4
Stimela2 is a new-generation framework for developing data reduction workflows. It is designed for radio astronomy data but can be adapted for other data processing applications. S…
PolarVis: Towards Web-based Polarimetric Analysis
Lexy A. L. Andati, O. M. Smirnov, S. Makhathini +1
Astronomers performing polarimetric analysis on astronomical images often have to manually identify locations on their objects of interest, such as galaxies, which exhibit the infl…
Lossy Compression of Large-Scale Radio Interferometric Data
M Atemkeng, S Perkins, E Seck +4
This work proposes to reduce visibility data volume using a baseline-dependent lossy compression technique that preserves smearing at the edges of the field-of-view. We exploit the…
Fast algorithms to approximate the position-dependent point spread function responses in radio interferometric wide-field imaging
M. Atemkeng, O. Smirnov, C. Tasse +2
The desire for wide-field of view, large fractional bandwidth, high sensitivity, high spectral and temporal resolution has driven radio interferometry to the point of big data revo…
MeerKATHI -- an end-to-end data reduction pipeline for MeerKAT and other radio telescopes
Gyula I. G. Józsa, Sarah V. White, Kshitij Thorat +13
MeerKATHI is the current development name for a radio-interferometric data reduction pipeline, assembled by an international collaboration. We create a publicly available end-to-en…
Primary beam effects of radio astronomy antennas -- II. Modelling the MeerKAT L-band beam
K. M. B. Asad, J. N. Girard, M. de Villers +12
After a decade of design and construction, South Africa's SKA-MID precursor MeerKAT has begun its science operations. To make full use of the widefield capability of the array, it…
Primary beam effects of radio astronomy antennas: I. Modelling the Karl G. Jansky Very Large Array (VLA) L-band beam using holography
K. Iheanetu, J. N. Girard, O. Smirnov +5
Modern interferometric imaging relies on advanced calibration that incorporates direction-dependent effects. Their increasing number of antennas (e.g. in LOFAR, VLA, MeerKAT/SKA) a…
Kliko - The Scientific Compute Container Format
Gijs Molenaar, Spheshile Makhathini, Julien N. Girard +1
Kliko is a Docker-based container specification for running one or multiple related compute jobs. The key concepts of Kliko are the encapsulation of data processing software into a…
RadioLensfit: Bayesian weak lensing measurement in the visibility domain
Marzia Rivi, Lance Miller, Sphesihle Makhathini +1
Observationally, weak lensing has been served so far by optical surveys due to the much larger number densities of background galaxies achieved, which is typically by two to three…
Radio Weak Lensing Shear Measurement in the Visibility Domain - I. Methodology
Marzia Rivi, Lance Miller, Sphesihle Makhathini +1
The high sensitivity of the new generation of radio telescopes such as the Square Kilometre Array (SKA) will allow cosmological weak lensing measurements at radio wavelengths that…
Morphological classification of radio sources for galaxy evolution and cosmology with SKA-MID
Sphesihle Makhathini, Oleg Smirnov, Matt Jarvis +1
Morphologically classifying radio sources in continuum images with the SKA has the potential to address some of the key questions in cosmology and galaxy evolution. In particular,…