Related papers: Mitigating Internal Instrument Coupling II: A Meth…

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

Bayesian estimation of cross-coupling and reflection systematics in 21cm array visibility data

Observations with radio arrays that target the 21-cm signal originating from the early Universe suffer from a variety of systematic effects. An important class of these are reflections and spurious couplings between antennas. We apply a…

Instrumentation and Methods for Astrophysics · Physics 2025-03-06 Geoff G. Murphy , Philip Bull , Mario G. Santos , Zara Abdurashidova , Tyrone Adams , James E. Aguirre , Paul Alexander , Zaki S. Ali , Rushelle Baartman , Yanga Balfour , Adam P. Beardsley , Gianni Bernardi , Tashalee Billings , Judd D. Bowman , Richard F. Bradley , Jacob Burba , Christopher Cain , Steven Carey , Chris L. Carilli , Carina Cheng , David R. DeBoer , Eloy de Lera Acedo , Matt Dexter , Joshua S. Dillon , 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 , Bryna J. Hazelton , Jacqueline N. Hewitt , Jack Hickish , Daniel C. Jacobs , Austin Julius , MacCalvin Kariseb , Nicholas S. Kern , Joshua Kerrigan , Piyanat Kittiwisit , Saul A. Kohn , Matthew Kolopanis , Adam Lanman , Paul La Plante , Adrian Liu , Anita Loots , 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 , Hans Nuwegeld , Aaron R. Parsons , Nipanjana Patra , Samantha Pieterse , Nima Razavi-Ghods , James Robnett , Kathryn Rosie , Peter Sims , Jackson Sipple , Craig Smith , Hilton Swarts , Nithyanandan Thyagarajan , Pieter van Wyngaarden , 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

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

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

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

Mitigating Internal Instrument Coupling for 21 cm Cosmology I: Temporal and Spectral Modeling in Simulations

We study the behavior of internal signal chain reflections and antenna cross coupling as systematics for 21 cm cosmological surveys. We outline the mathematics for how these systematics appear in interferometric visibilities and describe…

Instrumentation and Methods for Astrophysics · Physics 2019-10-28 Nicholas S. Kern , Aaron R. Parsons , Joshua S. Dillon , Adam E. Lanman , Nicolas Fagnoni , Eloy de Lera Acedo

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

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

Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations

The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionisation (EoR). This has led to the construction of low-frequency radio interferometric arrays, such as the Hydrogen Epoch of…

Instrumentation and Methods for Astrophysics · Physics 2024-07-31 N. Charles , N. S. Kern , R. Pascua , G. Bernardi , L. Bester , O. Smirnov , E. d. L. Acedo , Z. Abdurashidova , T. Adams , J. E. Aguirre , R. Baartman , A. P. Beardsley , L. M. Berkhout , T. S. Billings , J. D. Bowman , P. Bull , J. Burba , R. Byrne , S. Carey , K. Chen , S. Choudhuri , T. Cox , D. R. DeBoer , M. Dexter , J. S. Dillon , S. Dynes , N. Eksteen , J. Ely , A. Ewall-Wice , R. Fritz , S. R. Furlanetto , K. Gale-Sides , H. Garsden , B. K. Gehlot , A. Ghosh , A. Gorce , D. Gorthi , Z. Halday , B. J. Hazelton , J. N. Hewitt , J. Hickish , T. Huang , D. C. Jacobs , A. Josaitis , J. Kerrigan , P. Kittiwisit , M. Kolopanis , A. Lanman , A. Liu , Y. -Z. Ma , D. H. E. MacMahon , L. Malan , K. Malgas , C. Malgas , B. Marero , Z. E. Martinot , L. McBride , A. Mesinger , N. Mohamed-Hinds , M. Molewa , M. F. Morales , S. Murray , B. Nikolic , H. Nuwegeld , A. R. Parsons , N. Patra , P. L. Plante , Y. Qin , E. Rath , N. Razavi-Ghods , D. Riley , J. Robnett , K. Rosie , M. G. Santos , P. Sims , S. Singh , D. Storer , H. Swarts , J. Tan , M. J. Wilensky , P. K. G. Williams , P. v. Wyngaarden , H. Zheng

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

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

Quantifying Density-Ionization Correlations with the 21cm Power Spectrum

The Epoch of Reionization (EoR)---when neutral hydrogen in the intergalactic medium was systematically ionized---is a period in our Universe's history that is currently poorly understood. However, a key prediction of most models is a…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-25 Michael Pagano , Adrian Liu

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

Foreground modelling via Gaussian process regression: an application to HERA data

The key challenge in the observation of the redshifted 21-cm signal from cosmic reionization is its separation from the much brighter foreground emission. Such separation relies on the different spectral properties of the two components,…

Cosmology and Nongalactic Astrophysics · Physics 2020-05-20 Abhik Ghosh , Florent Mertens , Gianni Bernardi , Mário G. Santos , Nicholas S. Kern , Christopher L. Carilli , Trienko L. Grobler , Léon V. E. Koopmans , Daniel C. Jacobs , Adrian Liu , Aaron R. Parsons , Miguel F. Morales , James E. Aguirre , Joshua S. Dillon , Bryna J. Hazelton , Oleg M. Smirnov , Bharat K. Gehlot , Siyanda Matika , Paul Alexander , Zaki S. Ali , Adam P. Beardsley , Roshan K. Benefo , Tashalee S. Billings , Judd D. Bowman , Richard F. Bradley , Carina Cheng , Paul M. Chichura , David R. DeBoer , Eloy de Lera Acedo , Aaron Ewall-Wice , Gcobisa Fadana , Nicolas Fagnoni , Austin F. Fortino , Randall Fritz , Steve R. Furlanetto , Samavarti Gallardo , Brian Glendenning , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Jack Hickish , Alec Josaitis , Austin Julius , Amy S. Igarashi , MacCalvin Kariseb , Saul A. Kohn , Matthew Kolopanis , Telalo Lekalake , Anita Loots , David MacMahon , Lourence Malan , Cresshim Malgas , Matthys Maree , Zachary E. Martinot , Nathan Mathison , Eunice Matsetela , Andrei Mesinger , Abraham R. Neben , Bojan Nikolic , Chuneeta D. Nunhokee , Nipanjana Patra , Samantha Pieterse , 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

Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations

We report the most sensitive upper limits to date on the 21 cm epoch of reionization power spectrum using 94 nights of observing with Phase I of the Hydrogen Epoch of Reionization Array (HERA). Using similar analysis techniques as in…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-28 The HERA Collaboration , Zara Abdurashidova , Tyrone Adams , James E. Aguirre , Paul Alexander , Zaki S. Ali , Rushelle Baartman , Yanga Balfour , Rennan Barkana , Adam P. Beardsley , Gianni Bernardi , Tashalee S. Billings , Judd D. Bowman , Richard F. Bradley , Daniela Breitman , Philip Bull , Jacob Burba , Steve Carey , Chris L. Carilli , Carina Cheng , Samir Choudhuri , David R. DeBoer , Eloy de Lera Acedo , Matt Dexter , Joshua S. Dillon , John Ely , Aaron Ewall-Wice , Nicolas Fagnoni , Anastasia Fialkov , Randall Fritz , Steven R. Furlanetto , Kingsley Gale-Sides , Hugh Garsden , Brian Glendenning , Adélie Gorce , Deepthi Gorthi , Bradley Greig , Jasper Grobbelaar , Ziyaad Halday , Bryna J. Hazelton , Stefan Heimersheim , 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 , David Lewis , Adrian Liu , Anita Loots , Yin-Zhe Ma , David H. E. MacMahon , Lourence Malan , Keith Malgas , Cresshim Malgas , Matthys Maree , Bradley Marero , Zachary E. Martinot , Lisa McBride , Andrei Mesinger , Jordan Mirocha , Mathakane Molewa , Miguel F. Morales , Tshegofalang Mosiane , Julian B. Muñoz , Steven G. Murray , Vighnesh Nagpal , Abraham R. Neben , Bojan Nikolic , Chuneeta D. Nunhokee , Hans Nuwegeld , Aaron R. Parsons , Robert Pascua , Nipanjana Patra , Samantha Pieterse , Yuxiang Qin , Nima Razavi-Ghods , James Robnett , Kathryn Rosie , Mario G. Santos , Peter Sims , Saurabh Singh , Craig Smith , Hilton Swarts , Jianrong Tan , Nithyanandan Thyagarajan , Michael J. Wilensky , Peter K. G. Williams , Pieter van Wyngaarden , Haoxuan Zheng

The Impact of Beam Variations on Power Spectrum Estimation for 21 cm Cosmology II: Mitigation of Foreground Systematics for HERA

One key challenge in detecting 21 cm cosmological signal at z > 6 is to separate the cosmological signal from foreground emission. This can be studied in a power spectrum space where the foreground is confined to low delay modes whereas the…

Cosmology and Nongalactic Astrophysics · Physics 2023-07-25 Honggeun Kim , Nicholas S. Kern , Jacqueline N. Hewitt , Bang D. Nhan , Joshua S. Dillon , Eloy de Lera Acedo , Scott B. C. Dynes , Nivedita Mahesh , Nicolas Fagnoni , David R. DeBoer

Investigating Mutual Coupling in the Hydrogen Epoch of Reionization Array and Mitigating its Effects on the 21-cm Power Spectrum

Interferometric experiments designed to detect the highly redshifted 21-cm signal from neutral hydrogen are producing increasingly stringent constraints on the 21-cm power spectrum, but some k-modes remain systematics-dominated. Mutual…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-14 E. Rath , R. Pascua , A. T. Josaitis , A. Ewall-Wice , N. Fagnoni , E. de Lera Acedo , Z. E. Martinot , Z. Abdurashidova , T. Adams , J. E. Aguirre , R. Baartman , A. P. Beardsley , L. M. Berkhout , G. Bernardi , T. S. Billings , J. D. Bowman , P. Bull , J. Burba , R. Byrne , S. Carey , K. -F. Chen , S. Choudhuri , T. Cox , D. R. DeBoer , M. Dexter , J. S. Dillon , S. Dynes , N. Eksteen , J. Ely , R. Fritz , S. R. Furlanetto , K. Gale-Sides , H. Garsden , B. K. Gehlot , A. Ghosh , A. Gorce , D. Gorthi , Z. Halday , B. J. Hazelton , J. N. Hewitt , J. Hickish , T. Huang , D. C. Jacobs , N. S. Kern , J. Kerrigan , P. Kittiwisit , M. Kolopanis , A. Lanman , A. Liu , Y. -Z. Ma , D. H. E. MacMahon , L. Malan , C. Malgas , K. Malgas , B. Marero , L. McBride , A. Mesinger , N. Mohamed-Hinds , M. Molewa , M. F. Morales , S. G. Murray , B. Nikolic , H. Nuwegeld , A. R. Parsons , N. Patra , P. La Plante , Y. Qin , N. Razavi-Ghods , D. Riley , J. Robnett , K. Rosie , M. G. Santos , P. Sims , S. Singh , D. Storer , H. Swarts , J. Tan , M. J. Wilensky , P. K. G. Williams , P. van Wyngaarden , H. Zheng

What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization

A number of experiments are currently working towards a measurement of the 21 cm signal from the Epoch of Reionization. Whether or not these experiments deliver a detection of cosmological emission, their limited sensitivity will prevent…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Jonathan C. Pober , Adrian Liu , Joshua S. Dillon , James E. Aguirre , Judd D. Bowman , Richard F. Bradley , Chris L. Carilli , David R. DeBoer , Jacqueline N. Hewitt , Daniel C. Jacobs , Matthew McQuinn , Miguel F. Morales , Aaron R. Parsons , Max Tegmark , Dan J. Werthimer

Fundamental uncertainty levels of 21cm power spectra from a delay analysis

Several experimental efforts are underway to measure the power spectrum of 21cm fluctuations from the Epoch of Reionization (EoR) using low-frequency radio interferometers. Experiments like the Hydrogen Epoch of Reionization Array (HERA)…

Instrumentation and Methods for Astrophysics · Physics 2019-06-19 Adam E. Lanman , Jonathan C. Pober