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Hydrogen Epoch of Reionization Array (HERA) Phase II Deployment and Commissioning

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arxiv 2401.04304 v1 pith:PJ3ZUKRN submitted 2024-01-09 astro-ph.IM

Lindsay M. Berkhout , Daniel C. Jacobs , Zuhra Abdurashidova , Tyrone Adams , James E. Aguirre , Paul Alexander , Zaki S. Ali , Rushelle Baartman
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Yanga Balfour Adam P. Beardsley Gianni Bernardi Tashalee S. Billings Judd D. Bowman Richard F. Bradley Philip Bull Jacob Burba Steven Carey Chris L. Carilli Kai-Feng Chen Carina Cheng Samir Choudhuri David R. DeBoer Eloy de Lera Acedo Matt Dexter Joshua S. Dillon Scott Dynes Nico Eksteen John Ely Aaron Ewall-Wice Nicolas Fagnoni Randall Fritz Steven R. Furlanetto Kingsley Gale-Sides Hugh Garsden Bharat Kumar Gehlot Abhik Ghosh Brian Glendenning Adelie Gorce Deepthi Gorthi Bradley Greig Jasper Grobbelaar Ziyaad Halday Bryna J. Hazelton Jacqueline N. Hewitt Jack Hickish Tian Huang Alec Josaitis Austin Julius MacCalvin Kariseb Nicholas S. Kern Joshua Kerrigan Honggeun Kim Piyanat Kittiwisit Saul A. Kohn Matthew Kolopanis Adam Lanman Paul La Plante Adrian Liu Anita Loots Yin-Zhe Ma David Harold Edward MacMahon Lourence Malan Cresshim Malgas Keith Malgas Bradley Marero Zachary E. Martinot Andrei Mesinger Mathakane Molewa Miguel F. Morales Tshegofalang Mosiane Steven G. Murray Abraham R. Neben Bojan Nikolic Chuneeta Devi Nunhokee Hans Nuwegeld Aaron R. Parsons Robert Pascua Nipanjana Patra Samantha Pieterse Yuxiang Qin Eleanor Rath Nima Razavi-Ghods Daniel Riley James Robnett Kathryn Rosie Mario G. Santos Peter Sims Saurabh Singh Dara Storer Hilton Swarts Jianrong Tan Nithyanandan Thyagarajan Pieter van Wyngaarden Peter K. G. Williams Haoxuan Zheng Zhilei Xu
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This paper presents the design and deployment of the Hydrogen Epoch of Reionization Array (HERA) phase II system. HERA is designed as a staged experiment targeting 21 cm emission measurements of the Epoch of Reionization. First results from the phase I array are published as of early 2022, and deployment of the phase II system is nearing completion. We describe the design of the phase II system and discuss progress on commissioning and future upgrades. As HERA is a designated Square Kilometer Array (SKA) pathfinder instrument, we also show a number of "case studies" that investigate systematics seen while commissioning the phase II system, which may be of use in the design and operation of future arrays. Common pathologies are likely to manifest in similar ways across instruments, and many of these sources of contamination can be mitigated once the source is identified.

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