Related papers: Hydrogen Epoch of Reionization Array (HERA) Phase …

Hydrogen Epoch of Reionization Array (HERA)

The Hydrogen Epoch of Reionization Array (HERA) is a staged experiment to measure 21 cm emission from the primordial intergalactic medium (IGM) throughout cosmic reionization ($z=6-12$), and to explore earlier epochs of our Cosmic Dawn…

Instrumentation and Methods for Astrophysics · Physics 2017-03-08 David R. DeBoer , Aaron R. Parsons , James E. Aguirre , Paul Alexander , Zaki S. Ali , Adam P. Beardsley , Gianni Bernardi , Judd D. Bowman , Richard F. Bradley , Chris L. Carilli , Carina Cheng , Eloy de Lera Acedo , Joshua S. Dillon , Aaron Ewall-Wice , Gcobisa Fadana , Nicolas Fagnoni , Randall Fritz , Steve R. Furlanetto , Brian Glendenning , Bradley Greig , Jasper Grobbelaar , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Daniel C. Jacobs , Austin Julius , MacCalvin Kariseb , Saul A. Kohn , Telalo Lekalake , Adrian Liu , Anita Loots , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Nathan Mathison , Eunice Matsetela , Andrei Mesinger , Miguel F. Morales , Abraham R. Neben , Nipanjana Patra , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , Jon Ringuette , James Robnett , Kathryn Rosie , Raddwine Sell , Craig Smith , Angelo Syce , Max Tegmark , Nithyanandan Thyagarajan , Peter K. G. Williams , Haoxuan Zheng

Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum

We discuss absolute calibration strategies for Phase I of the Hydrogen Epoch of Reionization Array (HERA), which aims to measure the cosmological 21 cm signal from the Epoch of Reionization (EoR). HERA is a drift-scan array with a 10 degree…

Instrumentation and Methods for Astrophysics · Physics 2020-02-26 Nicholas S. Kern , Joshua S. Dillon , Aaron R. Parsons , Christopher L. Carilli , Gianni Bernardi , Zara Abdurashidova , James E. Aguirre , Paul Alexander , Zaki S. Ali , Yanga Balfour , Adam P. Beardsley , Tashalee S. Billings , Judd D. Bowman , Richard F. Bradley , Philip Bull , Jacob Burba , Steven Carey , Carina Cheng , David R. DeBoer , Matt Dexter , Eloy de Lera Acedo , John Ely , Aaron Ewall-Wice , Nicolas Fagnoni , Randall Fritz , Steve R. Furlanetto , Kingsley Gale-Sides , Brian Glendenning , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Ziyaad Halday , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Daniel C. Jacobs , Austin Julius , Joshua Kerrigan , Piyanat Kittiwisit , Saul A. Kohn , Matthew Kolopanis , Adam Lanman , Paul La Plante , Telalo Lekalake , Adrian Liu , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Zachary E. Martinot , Eunice Matsetela , Andrei Mesinger , Mathakane Molewa , Miguel F. Morales , Tshegofalang Mosiane , Steven G. Murray , Abraham R. Neben , Bojan Nikolic , Chuneeta D. Nunhokee , Nipanjana Patra , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , Jon Ringuette , James Robnett , Kathryn Rosie , Peter Sims , Craig Smith , Angelo Syce , Nithyanandan Thyagarajan , Peter K. G. Williams , Haoxuan Zheng

The Hydrogen Epoch of Reionization Array Dish III: Measuring Chromaticity of Prototype Element with Reflectometry

The experimental efforts to detect the redshifted 21 cm signal from the Epoch of Reionization (EoR) are limited predominantly by the chromatic instrumental systematic effect. The delay spectrum methodology for 21 cm power spectrum…

Instrumentation and Methods for Astrophysics · Physics 2018-03-21 Nipanjana Patra , Aaron R. Parsons , David R. DeBoer , Nithyanandan Thyagarajan , Aaron Ewall-Wice , Gilbert Hsyu , Tsz Kuk Leung , Cherie K. Day , James E. Aguirre , Paul Alexander , Zaki S. Ali , Adam P. Beardsley , Judd D. Bowman , Richard F. Bradley , Chris L. Carilli , Carina Cheng , Eloy de Lera Acedo , Joshua S. Dillon , Gcobisa Fadana , Nicolas Fagnoni , Randall Fritz , Steve R. Furlanetto , Brian Glendenning , Bradley Greig , Jasper Grobbelaar , Bryna J. Hazelton , Jacqueline N. Hewitt , Daniel C. Jacobs , Austin Julius , MacCalvin Kariseb , Saul A. Kohn , Anna Lebedeva , Telalo Lekalake , Adrian Liu , Anita Loots , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Zachary Martinot , Nathan Mathison , Eunice Matsetela , Andrei Mesinger , Miguel F. Morales , Abraham R. Neben , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , Jon Ringuette , James Robnett , Kathryn Rosie , Raddwine Sell , Craig Smith , Angelo Syce , Max Tegmark , Peter K. G. Williams , Haoxuan Zheng

Mitigating Internal Instrument Coupling II: A Method Demonstration with the Hydrogen Epoch of Reionization Array

We present a study of internal reflection and cross coupling systematics in Phase I of the Hydrogen Epoch of Reionization Array (HERA). In a companion paper, we outlined the mathematical formalism for such systematics and presented…

Instrumentation and Methods for Astrophysics · Physics 2020-01-15 Nicholas S. Kern , Aaron R. Parsons , Joshua S. Dillon , Adam E. Lanman , Adrian Liu , Philip Bull , Aaron Ewall-Wice , Zara Abdurashidova , James E. Aguirre , Paul Alexander , Zaki S. Ali , Yanga Balfour , Adam P. Beardsley , Gianni Bernardi , Judd D. Bowman , Richard F. Bradley , Jacob Burba , Chris L. Carilli , Carina Cheng , David R. DeBoer , Matt Dexter , Eloy de Lera Acedo , Nicolas Fagnoni , Randall Fritz , Steve R. Furlanetto , Brian Glendenning , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Ziyaad Halday , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Daniel C. Jacobs , Austin Julius , Joshua Kerrigan , Piyanat Kittiwisit , Saul A. Kohn , Matthew Kolopanis , Paul La Plante , Telalo Lekalake , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Zachary E. Martinot , Eunice Matsetela , Andrei Mesinger , Mathakane Molewa , Miguel F. Morales , Tshegofalang Mosiane , Steven G. Murray , Abraham R. Neben , Aaron R. Parsons , Nipanjana Patra , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , Jon Ringuette , James Robnett , Kathryn Rosie , Peter Sims , Craig Smith , Angelo Syce , Nithyanandan Thyagarajan , Peter K. G. Williams , Haoxuan Zheng

The Hydrogen Epoch of Reionization Array (HERA). Improvement of the antenna response with a matching network and scientific impacts

The Hydrogen Epoch of Reionization Array (HERA) is a new powerful radio-telescope, dedicated to the study of the early universe. Its main goal is to characterise the period of the universe where the first galaxies and stars started to form,…

Instrumentation and Methods for Astrophysics · Physics 2016-06-29 Nicolas Fagnoni , Eloy de Lera Acedo

Parameters Estimation from the 21 cm signal using Variational Inference

Upcoming experiments such as Hydrogen Epoch of Reionization Array (HERA) and Square Kilometre Array (SKA) are intended to measure the 21cm signal over a wide range of redshifts, representing an incredible opportunity in advancing our…

Cosmology and Nongalactic Astrophysics · Physics 2020-05-06 Héctor J. Hortúa , Riccardo Volpi , Luigi Malagò

The Hydrogen Epoch of Reionization Array Dish I: Beam Pattern Measurements and Science Implications

The Hydrogen Epoch of Reionization Array (HERA) is a radio interferometer aiming to detect the power spectrum of 21 cm fluctuations from neutral hydrogen from the Epoch of Reionization (EOR). Drawing on lessons from the Murchison Widefield…

Instrumentation and Methods for Astrophysics · Physics 2016-12-08 Abraham R. Neben , Richard F. Bradley , Jacqueline N. Hewitt , David R. DeBoer , Aaron R. Parsons , James E. Aguirre , Zaki S. Ali , Carina Cheng , Aaron Ewall-Wice , Nipanjana Patra , Nithyanandan Thyagarajan , Judd Bowman , Roger Dickenson , Joshua S. Dillon , Phillip Doolittle , Dennis Egan , Mike Hedrick , Daniel C. Jacobs , Saul A. Kohn , Patricia J. Klima , Kavilan Moodley , Benjamin R. B. Saliwanchik , Patrick Schaffner , John Shelton , H. A. Taylor , Rusty Taylor , Max Tegmark , Butch Wirt , Haoxuan Zheng

The Hydrogen Epoch of Reionization Array Dish II: Characterization of Spectral Structure with Electromagnetic Simulations and its science Implications

We use time-domain electromagnetic simulations to determine the spectral characteristics of the Hydrogen Epoch of Reionization Arrays (HERA) antenna. These simulations are part of a multi-faceted campaign to determine the effectiveness of…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-15 Aaron Ewall-Wice , Richard Bradley , David DeBoer , Jacqueline Hewitt , Aaron Parsons , James Aguierre , Zaki S. Ali , Judd Bowman , Carina Cheng , Abraham R. Neben , Nipanjana Patra , Nithyanandan Thyagarajan , Mariet Venter , Eloy de Lera Acedo , Joshua S. Dillon , Roger Dickenson , Phillip Doolittle , Dennis Egan , Mike Hedrick , Patricia Klima , Saul Kohn , Patrick Schaffner , John Shelton , Benjamin Saliwanchik , H. A. Taylor , Rusty Taylor , Max Tegmark , Butch Wirt

First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum

We report upper-limits on the Epoch of Reionization (EoR) 21 cm power spectrum at redshifts 7.9 and 10.4 with 18 nights of data ($\sim36$ hours of integration) from Phase I of the Hydrogen Epoch of Reionization Array (HERA). The Phase I…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-02 The HERA Collaboration , 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 , Steve Carey , Chris L. Carilli , Carina Cheng , David R. DeBoer , Matt Dexter , Eloy de Lera Acedo , Taylor Dibblee-Barkman , Joshua S. Dillon , John Ely , Aaron Ewall-Wice , Nicolas Fagnoni , Randall Fritz , Steven R. Furlanetto , Kingsley Gale-Sides , Brian Glendenning , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Ziyaad Halday , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Daniel C. Jacobs , Austin Julius , Nicholas S. Kern , Joshua Kerrigan , Piyanat Kittiwisit , Saul A. Kohn , Matthew Kolopanis , Adam Lanman , Paul La Plante , Telalo Lekalake , David Lewis , Adrian Liu , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Zachary E. Martinot , Eunice Matsetela , Andrei Mesinger , Mathakane Molewa , Miguel F. Morales , Tshegofalang Mosiane , Steven G. Murray , Abraham R. Neben , Bojan Nikolic , Chuneeta D. Nunhokee , Aaron R. Parsons , Nipanjana Patra , Robert Pascua , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , Jon Ringuette , James Robnett , Kathryn Rosie , Peter Sims , Saurabh Singh , Craig Smith , Angelo Syce , Nithyanandan Thyagarajan , Peter K. G. Williams , Haoxuan Zheng

Redundant Array Configurations for 21 cm Cosmology

Realizing the potential of 21 cm tomography to statistically probe the intergalactic medium before and during the Epoch of Reionization requires large telescopes and precise control of systematics. Next-generation telescopes are now being…

Instrumentation and Methods for Astrophysics · Physics 2016-08-17 Joshua S. Dillon , Aaron R. Parsons

Sensitivity of the Hydrogen Epoch of Reionization Array and its Build-out Stages to One-point Statistics from Redshifted 21 cm Observations

We present a baseline sensitivity analysis of the Hydrogen Epoch of Reionization Array (HERA) and its build-out stages to one-point statistics (variance, skewness, and kurtosis) of redshifted 21 cm intensity fluctuation from the Epoch of…

Cosmology and Nongalactic Astrophysics · Physics 2018-04-26 Piyanat Kittiwisit , Judd D. Bowman , Daniel C. Jacobs , Adam P. Beardsley , Nithyanandan Thyagarajan

Estimating the Feasibility of 21cm-Ly$\alpha$ Synergies using the Hydrogen Epoch of Reionization Array

Cross-correlating 21cm and Ly$\alpha$ intensity maps of the Epoch of Reionization (EoR) promises to be a powerful tool for exploring the properties of the first galaxies. Next-generation intensity mapping experiments such as the Hydrogen…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-02 Tyler A. Cox , Daniel C. Jacobs , Steven G. Murray

Constraining High Redshift X-ray Sources with Next Generation 21 cm Power Spectrum Measurements

We use the Fisher matrix formalism and semi-numerical simulations to derive quantitative predictions of the constraints that power spectrum measurements on next-generation interferometers, such as the Hydrogen Epoch of Reionization Array…

Cosmology and Nongalactic Astrophysics · Physics 2016-04-26 Aaron Ewall-Wice , Jacqueline Hewitt , Andrei Mesinger , Joshua S. Dillon , Adrian Liu , Jonathan Pober

First Results from HERA Phase II

We report the first upper limits on the power spectrum of 21-cm fluctuations during the Epoch of Reionization and Cosmic Dawn from Phase II of the Hydrogen Epoch of Reionization Array (HERA) experiment. HERA Phase II constitutes several…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-27 The HERA Collaboration , Zuhra Abdurashidova , Tyrone Adams , James E. Aguirre , Rushelle Baartman , Rennan Barkana , Lindsay M. Berkhout , Gianni Bernardi , Tashalee S. Billings , Bruno B. Bizarria , Judd D. Bowman , Daniela Breitman , Philip Bull , Jacob Burba , Ruby Byrne , Steven Carey , Rajorshi Sushovan Chandra , Kai-Feng Chen , Samir Choudhuri , Tyler Cox , David R. DeBoer , Eloy de Lera Acedo , Matt Dexter , Jiten Dhandha , Joshua S. Dillon , Scott Dynes , Nico Eksteen , John Ely , Aaron Ewall-Wice , Nicolas Fagnoni , Anastasia Fialkov , Steven R. Furlanetto , Kingsley Gale-Sides , Hugh Garsden , Adelie Gorce , Deepthi Gorthi , Ziyaad Halday , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Tian Huang , Daniel C. Jacobs , Alec Josaitis , Nicholas S. Kern , Joshua Kerrigan , Piyanat Kittiwisit , Matthew Kolopanis , Adam Lanman , Paul La Plante , Adrian Liu , Yin-Zhe Ma , David H. E. MacMahon , Lourence Malan , Cresshim Malgas , Keith Malgas , Bradley Marero , Zachary E. Martinot , Lisa McBride , Andrei Mesinger , Jordan Mirocha , Nicel Mohamed-Hinds , Mathakane Molewa , Miguel F. Morales , Julian B. Muñoz , Steven G. Murray , Bojan Nikolic , Hans Nuwegeld , Aaron R. Parsons , Robert Pascua , Nipanjana Patra , Simon Pochinda , Yuxiang Qin , Eleanor Rath , Nima Razavi-Ghods , Daniel Riley , Kathryn Rosie , Mario G. Santos , Saurabh Singh , Dara Storer , Hilton Swarts , Jianrong Tan , Emilie Thélie , Pieter van Wyngaarden , Michael J. Wilensky , Peter K. G. Williams , Haoxuan Zheng

Developing a Real Time Processing System for HERA

The Hydrogen Epoch of Reionization Array (HERA) is a radio telescope in the Karoo desert of South Africa endeavoring to observe Cosmic Dawn and the Epoch of Reionization. When fully constructed, it will consist of 350 antennas and generate…

Instrumentation and Methods for Astrophysics · Physics 2020-10-26 Paul La Plante , Peter K. G. Williams , Joshua S. Dillon

SKA-Low Intensity Mapping Pathfinder Updates: Deeper 21 cm Power Spectrum Limits from Improved Analysis Frameworks

The Square Kilometre Array (SKA) is a planned radio interferometer of unprecedented scale that will revolutionize low-frequency radio astronomy when completed. In particular, one of its core science drivers is the systematic mapping of the…

Cosmology and Nongalactic Astrophysics · Physics 2022-01-11 Nichole Barry , Gianni Bernardi , Bradley Greig , Nicholas Kern , Florent Mertens

Effects of Antenna Beam Chromaticity on Redshifted 21~cm Power Spectrum and Implications for Hydrogen Epoch of Reionization Array

Unaccounted for systematics from foregrounds and instruments can severely limit the sensitivity of current experiments from detecting redshifted 21~cm signals from the Epoch of Reionization (EoR). Upcoming experiments are faced with a…

Cosmology and Nongalactic Astrophysics · Physics 2016-07-06 Nithyanandan Thyagarajan , Aaron Parsons , David DeBoer , Judd Bowman , Aaron Ewall-Wice , Abraham Neben , Nipanjana Patra

Imaging and Modeling Data from the Hydrogen Epoch of Reionization Array

We analyze data from the Hydrogen Epoch of Reionization Array. This is the third in a series of papers on the closure phase delay-spectrum technique designed to detect the HI 21cm emission from cosmic reionization. We present the details of…

Instrumentation and Methods for Astrophysics · Physics 2022-01-19 C. L. Carilli{1 , 2} , N. Thyagarajan{1} , J. Kent{2} , B. Nikolic{2} , K. Gale-Sides{2} , N. S. Kern{3} , G. Bernardi{4 , 5 , 6} , A. Mesinger{7} , S. Matika{5} , the HERA TEAM {1}{National Radio Astronomy Observatory , P. O. Box 0 , Socorro , NM 87801 , USA , ccarilli@nrao. edu , ORCID , : , 0000-0001-6647-3861} {2}{Astrophysics Group , Cavendish Laboratory , JJ Thomson Avenue , Cambridge CB3 0HE , UK} {3}{Department of Astronomy , University of California , Berkeley , CA} {4}{INAF-Istituto di Radioastronomia , via Gobetti 101 , 40129 , Bologna , Italy} {5}{Department of Physics , Electronics , Rhodes University , PO Box 94 , Grahamstown , 6140 , South Africa} {6}{The South African Radio Astronomy Observatory , 2 Fir Street , Black River Park , Observatory , 7925 , South Africa} {7}{Scuola Normale Superiore , 56126 Pisa , PI , Italy}

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

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…

Instrumentation and Methods for Astrophysics · Physics 2020-10-28 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 , Randall Fritz , Steve R. Furlanetto , Kingsley Gale-Sides , Brian Glendenning , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Ziyaad Halday , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Daniel C. Jacobs , Alec Josaitis , Austin Julius , Nicholas S. Kern , Joshua Kerrigan , Honggeun Kim , Piyanat Kittiwisit , Saul A. Kohn , Matthew Kolopanis , Adam Lanman , Paul La Plante , Telalo Lekalake , Adrian Liu , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Zachary E. Martinot , Eunice Matsetela , Juan Mena Parra , Andrei Mesinger , Mathakane Molewa , Miguel F. Morales , Tshegofalang Mosiane , Abraham R. Neben , Bojan Nikolic , Aaron R. Parsons , Nipanjana Patra , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , James Robnett , Kathryn Rosie , Peter Sims , Craig Smith , Angelo Syce , Nithyanandan Thyagarajan , Peter K. G. Williams , Haoxuan Zheng

Search for the Epoch of Reionisation with HERA: Upper Limits on the Closure Phase Delay Power Spectrum

Radio interferometers aiming to measure the power spectrum of the redshifted 21 cm line during the Epoch of Reionisation (EoR) need to achieve an unprecedented dynamic range to separate the weak signal from overwhelming foreground…

Cosmology and Nongalactic Astrophysics · Physics 2023-07-12 Pascal M. Keller , Bojan Nikolic , Nithyanandan Thyagarajan , Chris L. Carilli , Gianni Bernardi , Ntsikelelo Charles , Landman Bester , Oleg M. Smirnov , Nicholas S. Kern , Joshua S. Dillon , Bryna J. Hazelton , Miguel F. Morales , Daniel C. Jacobs , Aaron R. Parsons , Zara Abdurashidova , Tyrone Adams , James E. Aguirre , Paul Alexander , Zaki S. Ali , Rushelle Baartman , Yanga Balfour , Adam P. Beardsley , Tashalee S. Billings , Judd D. Bowman , Richard F. Bradley , Philip Bull , Jacob Burba , Steven Carey , Carina Cheng , David R. DeBoer , Eloy de Lera Acedo , Matt Dexter , Nico Eksteen , John Ely , Aaron Ewall-Wice , Nicolas Fagnoni , Randall Fritz , Steven R. Furlanetto , Kingsley Gale-Sides , Brian Glendenning , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Ziyaad Halday , Jacqueline N. Hewitt , Jack Hickish , Austin Julius , MacCalvin Kariseb , Joshua Kerrigan , 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 , Tshegofalang Mosiane , Steven G. Murray , Abraham R. Neben , Hans Nuwegeld , Robert Pascua , Nipanjana Patra , Samantha Pieterse , Jonathan C. Pober , Nima Razavi-Ghods , James Robnett , Kathryn Rosie , Mario G. Santos , Peter Sims , Craig Smith , Hilton Swarts , Pieter Van Wyngaarden , Peter K. G. Williams , Haoxuan Zheng