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September 10, 2025Monthly Notices of the Royal Astronomical SocietyOpen Access

Square Kilometre Array Science Data Challenge 3a: foreground removal for an EoR experiment

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Authors

ABAnna BonaldiPHPhilippa HartleyRBRobert D. Braun

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Overview

EoR foreground removal was assessed in simulated data from the Square Kilometre Array, indicating varied team performance.

Key Points

  • The median error in EoR power spectrum recovery was below the true signal for seven teams, suggesting effective foreground removal techniques.
  • Seventeen teams participated, with diverse approaches yielding cylindrical power spectra and corresponding confidence levels in the EoR signal.
  • The smallest residual error observed was $4.2_{-4.2}^{+20} \times 10^{-4}\, \rm {K}^2h^{-3}$cMpc3, demonstrating significant progress in recovering faint signals.
  • Confidence level estimations were often inaccurate, indicating potential areas for improvement in error estimation methods.

Cite This Study

Bonaldi et al. (2025) studied this question.

synapsesocial.com/papers/68c195649b7b07f3a0619709https://doi.org/10.1093/mnras/staf1466
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