Search Results for author: Philipp Arras

Found 2 papers, 0 papers with code

Comparison of classical and Bayesian imaging in radio interferometry

no code implementations26 Aug 2020 Philipp Arras, Richard A. Perley, Hertzog L. Bester, Reimar Leike, Oleg Smirnov, Rüdiger Westermann, Torsten A. Enßlin

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, and the common practice of convolving the CLEAN components with the CLEAN beam erases the potential for super-resolution; it does not output uncertainty information; it produces images with unphysical negative flux regions; and its results are highly dependent on the so-called weighting scheme as well as on any human choice of CLEAN masks to guiding the imaging.

Instrumentation and Methods for Astrophysics Applications

Variable structures in M87* from space, time and frequency resolved interferometry

no code implementations12 Feb 2020 Philipp Arras, Philipp Frank, Philipp Haim, Jakob Knollmüller, Reimar Leike, Martin Reinecke, Torsten Enßlin

Observing the dynamics of compact astrophysical objects provides insights into their inner workings, thereby probing physics under extreme conditions.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies

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