Skip to main content Accessibility help
×
  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

1 results

  • 11 - Applications to Astronomical Imaging

  • Stefano De Marchi, Università degli Studi di Padova, Italy, Francesco Marchetti, Università degli Studi di Padova, Italy, Emma Perracchione, Politecnico di Torino
  • Book:
    Kernel-Based Methods
    Published online:
    08 August 2026
    Print publication:
    03 September 2026, pp 91-104

  • Summary

    Solar hard X-ray imaging from RHESSI observations presents a parametric Fourier imaging problem where visibility data are sampled at scattered spatial frequencies across multiple energy channels. We present a VSK-based interpolation/extrapolation framework that exploits spectral correlations between adjacent energy channels. Theoretical analysis establishes stability bounds and shows that using correlated reconstructions as scaling functions regularizes along the parameter direction. Applied to RHESSI flare data, this approach yields regularized photon spectra with reduced uncertainties compared to independent reconstructions.