Journal article

Methods of Error Estimation for Delay Power Spectra in 21 cm Cosmology

Jianrong Tan, Adrian Liu, Nicholas S Kern, Zara Abdurashidova, James E Aguirre, Paul Alexander, Zaki S Ali, Yanga Balfour, Adam P Beardsley, Gianni Bernardi, Tashalee S Billings, Judd D Bowman, Richard F Bradley, Philip Bull, Jacob Burba, Steven Carey, Christopher L Carilli, Carina Cheng, David R DeBoer, Matt Dexter Show all

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | IOP PUBLISHING LTD | Published : 2021

Abstract

Precise measurements of the 21 cm power spectrum are crucial for understanding the physical processes of hydrogen reionization. Currently, this probe is being pursued by low-frequency radio interferometer arrays. As these experiments come closer to making a first detection of the signal, error estimation will play an increasingly important role in setting robust measurements. Using the delay power spectrum approach, we have produced a critical examination of different ways that one can estimate error bars on the power spectrum. We do this through a synthesis of analytic work, simulations of toy models, and tests on small amounts of real data. We find that, although computed independently, th..

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University of Melbourne Researchers

Grants

Awarded by National Science Foundation


Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)


Awarded by INAF PRIN-SKA 2017 project


Awarded by Ministero degli Affari Esteri della Cooperazione Internazionale-Direzione Generale per la Promozione del Sistema Paese Progetto di Grande Rilevanza, ISARP RADIOSKY2020 Joint Research Scheme


Awarded by National Research Foundation of South Africa, ISARP RADIOSKY2020 Joint Research Scheme


Awarded by Newton Fund


Awarded by European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program


Awarded by STFC


Awarded by NSF AAPF award


Awarded by National Research Foundation of South Africa


Funding Acknowledgements

This material is based upon work supported by the National Science Foundation under grant Nos. 1636646 and 1836019 and institutional support from the HERA collaboration partners. This research is funded in part by the Gordon and Betty Moore Foundation. HERA is hosted by the South African Radio Astronomy Observatory, which is a facility of the National Research Foundation, an agency of the Department of Science and Innovation. Parts of this research were supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) through project No. CE170100013. G.B. acknowledges funding from the INAF PRIN-SKA 2017 project 1.05.01.88.04 (FORECaST) and support from the Ministero degli Affari Esteri della Cooperazione Internazionale-Direzione Generale per la Promozione del Sistema Paese Progetto di Grande Rilevanza ZA18GR02 and the National Research Foundation of South Africa (grant No. 113121) as part of the ISARP RADIOSKY2020 Joint Research Scheme, the Royal Society and the Newton Fund under grant NA150184, and the National Research Foundation of South Africa (grant No. 103424). P.B. acknowledges funding for part of this research from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 948764) and from STFC grant ST/T000341/1. J.S.D. gratefully acknowledges the support of NSF AAPF award No. 1701536. N.K. acknowledges support from the MIT Pappalardo fellowship. A.L. acknowledges support from the New Frontiers in Research Fund Exploration grant program, the Canadian Institute for Advanced Research (CIFAR) Azrieli Global Scholars program, a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant and a Discovery Launch Supplement, the Sloan Research Fellowship, and the William Dawson Scholarship at McGill.