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Bayesian radio interferometric imaging with direction-dependent calibration
Jakob Roth, Philipp Arras, Martin Reinecke +3
Context: Radio interferometers measure frequency components of the sky brightness, modulated by the gains of the individual radio antennas. Due to atmospheric turbulence and variat…
The ngEHT Analysis Challenges
Freek Roelofs, Lindy Blackburn, Greg Lindahl +15
The next-generation Event Horizon Telescope (ngEHT) will be a significant enhancement of the Event Horizon Telescope (EHT) array, with new antennas and instrumental upgra…
Fast-Cadence High-Contrast Imaging with Information Field Theory
Jakob Roth, Gianluca Li Causi, Vincenzo Testa +2
Although many exoplanets have been indirectly detected over the last years, direct imaging of them with ground-based telescopes remains challenging. In the presence of atmospheric…
Bayesian statistics approach to imaging of aperture synthesis data: RESOLVE meets ALMA
Łukasz Tychoniec, Fabrizia Guglielmetti, Philipp Arras +2
The Atacama Large Millimeter/submillimeter Array (ALMA) is currently revolutionizing observational astrophysics. The aperture synthesis technique provides angular resolution otherw…
Bayesian and Machine Learning Methods in the Big Data era for astronomical imaging
Fabrizia Guglielmetti, Philipp Arras, Michele Delli Veneri +4
The Atacama Large Millimeter/submillimeter Array with the planned electronic upgrades will deliver an unprecedented amount of deep and high resolution observations. Wider fields of…
Efficient wide-field radio interferometry response
Philipp Arras, Martin Reinecke, Rüdiger Westermann +1
Radio interferometers do not measure the sky brightness distribution directly but rather a modified Fourier transform of it. Imaging algorithms, thus, need a computational represen…