Work

CLEAN and multiscale CLEAN for STIX in Solar Orbiter

Year: 2026

Type: article

Abstract: CLEAN is a well-established deconvolution approach to Fourier imaging at radio wavelengths and hard X-ray energies. One of the main limitations of CLEAN for hard X-ray imaging is that it requires a final convolution step by means of a convolution kernel whose width is strongly user dependent, and moreover, under-resolution effects are often introduced. This paper describes a multiscale version of CLEAN that is specifically tailored to the reconstruction of images from measurements observed by the Spectrometer/Telescope for Imaging X-rays (STIX) on board Solar Orbiter. Using synthetic STIX data, this study shows that multiscale CLEAN might represent a reliable solution to the two CLEAN limitations described above. Further, we show the performances of CLEAN and its multiscale release in reconstructing experimental real scenarios characterized by complex emission morphologies.

Source: Astronomy and Astrophysics

DOI: 10.1051/0004-6361/202557119

Authors: Miriana Catalano, Anna Volpara, Paolo Massa, Michele Piana, Anna Maria Massone

Institutions: University of Genoa, FHNW University of Applied Sciences and Arts Northwestern Switzerland, Osservatorio Astrofisico di Torino, National Institute for Astrophysics

Language: English

Topic: Solar and Space Plasma Dynamics

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,865

OpenAlex ID: W7124187777

FWCI:

Cites: 23

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