4.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Rhodes UniversityZA66 papers
- Leiden UniversityNL63 papers
- University of GroningenNL63 papers
- University of the WitwatersrandZA63 papers
- South African Radio Astronomy ObservatoryZA58 papers
- Istituto di Radioastronomia di BolognaIT54 papers
- Netherlands Institute for Radio AstronomyNL54 papers
- Centre National de la Recherche ScientifiqueFR50 papers
- National Radio Astronomy ObservatoryUS46 papers
- Max Planck Institute for Radio AstronomyDE45 papers
- University of ArizonaUS44 papers
- University of ChicagoUS44 papers
13 papers · 1 filter
Prospecting MeerKAT Continuum Data for Enigmatic Radio Sources with Unsupervised Vector-Quantised Variational Autoencoders
Fernando L. Ventura, Kshitij Thorat, Anna Bosman +2
We present a novel application of Vector quantised variational autoencoders (VQ-VAEs) as an unsupervised tool to probe deep 1.28 GHz radio continuum images taken from the MeerKAT G…
Latest developments in wide-field VLBI
Jack F. Radcliffe, J. P. McKean, C. Herbé-George +2
Very Long Baseline Interferometry (VLBI) combines the signals of telescopes distributed across thousands of kilometres to provide some of the highest angular resolution images of a…
Reducing false positives in strong lens detection through effective augmentation and ensemble learning
Samira Rezaei, Amirmohammad Chegeni, Bharath Chowdhary Nagam +4
This research studies the impact of high-quality training datasets on the performance of Convolutional Neural Networks (CNNs) in detecting strong gravitational lenses. We stress th…
First Very Long Baseline Interferometry Detections at 870μm
Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada +276
The first very long baseline interferometry (VLBI) detections at 870m wavelength (345GHz frequency) are reported, achieving the highest diffraction-limited angular resolutio…
Selective Dynamical Imaging of Interferometric Data
Joseph Farah, Peter Galison, Kazunori Akiyama +16
Recent developments in very long baseline interferometry (VLBI) have made it possible for the Event Horizon Telescope (EHT) to resolve the innermost accretion flows of the largest…
Feature Guided Training and Rotational Standardisation for the Morphological Classification of Radio Galaxies
Kevin Brand, Trienko L. Grobler, Waldo Kleynhans +3
State-of-the-art radio observatories produce large amounts of data which can be used to study the properties of radio galaxies. However, with this rapid increase in data volume, it…
MeqSilhouette v2: Spectrally-resolved polarimetric synthetic data generation for the Event Horizon Telescope
Iniyan Natarajan, Roger Deane, Iván Martí-Vidal +17
We present MeqSilhouette v2.0 (MeqSv2), a fully polarimetric, time-and frequency-resolved synthetic data generation software for simulating millimetre (mm) wavelength very long bas…
A probabilistic approach to phase calibration: I. Effects of source structure on fringe-fitting
Iniyan Natarajan, Roger Deane, Ilse van Bemmel +6
We propose a probabilistic framework for performing simultaneous estimation of source structure and fringe-fitting parameters in Very Long Baseline Interferometry (VLBI) observatio…
SYMBA: An end-to-end VLBI synthetic data generation pipeline
F. Roelofs, M. Janssen, I. Natarajan +203
Realistic synthetic observations of theoretical source models are essential for our understanding of real observational data. In using synthetic data, one can verify the extent to…
Studying Black Holes on Horizon Scales with VLBI Ground Arrays
Lindy Blackburn, Sheperd Doeleman, Jason Dexter +35
High-resolution imaging of supermassive black holes is now possible, with new applications to testing general relativity and horizon-scale accretion and relativistic jet formation…
First M87 Event Horizon Telescope Results. II. Array and Instrumentation
The Event Horizon Telescope Collaboration
The Event Horizon Telescope (EHT) is a very long baseline interferometry (VLBI) array that comprises millimeter- and submillimeter-wavelength telescopes separated by distances comp…
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…
Calibration artefacts in radio interferometry. I. Ghost sources in WSRT data
T. G. Grobler, C. D. Nunhokee, O. M. Smirnov +2
This work investigates a particular class of artefacts, or ghost sources, in radio interferometric images. Earlier observations with (and simulations of) the Westerbork Synthesis R…