Impact of numerical stability in Bayesian noise wave calibration on global 21-cm experiments

arXiv:2607.26911 · astro-ph.CO, astro-ph.IM · Submitted 2026-07-29 · Read on arXiv

Saswata Dasgupta, Adarsh Kumar Dash, Dominic Anstey, Harry T. J. Bevins, Christian Kirkham, Eloy de Lera Acedo

astro-ph.CO, astro-ph.IM

Submitted: 2026-07-29

Comments: 15 pages, 17 figures, To be submitted to MNRAS

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 95× in this paper · explained in 7 episodes
• Degeneracy — 20× in this paper · explained in 3 episodes
• 21-cm signal — 9× in this paper · explained in 1 episode
• Accuracy — 6× in this paper · explained in 1 episode
• Cosmic Dawn — 5× in this paper
• Frequency Dependence — 5× in this paper · explained in 2 episodes
• Epoch of Reionization — 4× in this paper
• Chebyshev Polynomials — 2× in this paper · explained in 2 episodes
• Power Spectral Density — 2× in this paper
• Consistency — 1× in this paper · explained in 3 episodes
• Robustness — 1× in this paper · explained in 5 episodes
• Self-consistency — 1× in this paper · explained in 2 episodes
• Singular Value Decomposition (SVD) — 1× in this paper · explained in 2 episodes
• Singular Value Decompostition — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes

Sources

• The Spectrometer Development of CosmoCube, Lunar Orbiting Satellite to Detect 21-cm Hydrogen Signal from Cosmic Dark Ages
• LuSEE 'Night': The Lunar Surface Electromagnetics Experiment
• RHINO: A large horn antenna for detecting the 21cm global signal
• The Electromagnetically Isolated Global Signal Estimation Platform (EIGSEP)
• Optimisation of calibration sources for global 21-cm experiments: the REACH case
• Narrowing the discovery space of the cosmological 21-cm signal using multi-wavelength constraints
• The Cosmic Dawn and Epoch of Reionization with the Square Kilometre Array
• Exploring the Cosmic Dawn with NenuFAR

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