Journal article

Understanding the HERA Phase I receiver system with simulations and its impact on the detectability of the EoR delay power spectrum

Nicolas Fagnoni, Eloy de Lera Acedo, David R DeBoer, 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, Phil Bull, Jacob Burba, Chris L Carilli, Carina Cheng, Matt Dexter, Joshua S Dillon, Aaron Ewall-Wice Show all

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2021

Abstract

The detection of the Epoch of Reionization (EoR) delay power spectrum using a 'foreground avoidance method' highly depends on the instrument chromaticity. The systematic effects induced by the radio telescope spread the foreground signal in the delay domain, which contaminates the EoR window theoretically observable. Applied to the Hydrogen Epoch of Reionization Array (HERA), this paper combines detailed electromagnetic and electrical simulations in order to model the chromatic effects of the instrument, and quantify its frequency and time responses. In particular, the effects of the analogue receiver, transmission cables, and mutual coupling are included. These simulations are able to accur..

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University of Melbourne Researchers

Grants

Awarded by National Science Foundation


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. The authors also acknowledge the UK Science and Technology Facilities Council (STFC), as well as the Institute of Astronomy and the Physics Department of the University of Cambridge (UK) for their financial support via the Isaac Newton Studentship.