DSpace Repository

Browsing by Author "Billings, Tashalee S."

Browsing by Author "Billings, Tashalee S."

Sort by: Order: Results:

  • Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum 
    Kern, Nicholas S.; Dillon, Joshua S.; Parsons, Aaron R.; Carilli, Christopher L.; Bernardi, Gianni; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steve R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; Liu, Adrian; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Sims, Peter; Smith, Craig; Syce, Angelo; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2020)
    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. HERA is a drift-scan array with ...
  • Automated Detection of Antenna Malfunctions in Large- <I>N</I> Interferometers: A Case Study with the Hydrogen Epoch of Reionization Array 
    Storer, Dara; Dillon, Joshua S.; Jacobs, Daniel C.; Morales, Miguel F.; Hazelton, Bryna J.; Ewall-Wice, Aaron; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Lera Acedo, Eloy; Dexter, Matt; Dynes, Scott; Ely, John; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hewitt, Jacqueline N.; Hickish, Jack; Huang, Tian; Josaitis, Alec; Julius, Austin; Kariseb, MacCalvin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Liu, Adrian; Loots, Anita; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta Devi; Parsons, Aaron R.; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Riley, Daniel; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Singh, Saurabh; Smith, Craig; Tan, Jianrong; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2021)
  • Automated Detection of Antenna Malfunctions in Large-N Interferometers: A Case Study With the Hydrogen Epoch of Reionization Array 
    Storer, Dara; Dillon, Joshua S.; Jacobs, Daniel C.; Morales, Miguel F.; Hazelton, Bryna J.; Ewall-Wice, Aaron; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Dynes, Scott; Ely, John; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hewitt, Jacqueline N.; Hickish, Jack; Huang, Tian; Josaitis, Alec; Julius, Austin; Kariseb, MacCalvin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Liu, Adrian; Loots, Anita; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta Devi; Parsons, Aaron R.; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Riley, Daniel; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Singh, Saurabh; Smith, Craig; Tan, Jianrong; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2022)
    We present a framework for identifying and flagging malfunctioning antennas in large radio interferometers. We outline two distinct categories of metrics designed to detect outliers along known failure modes of large arrays: ...
  • Bayesian jackknife tests with a small number of subsets: application to HERA 21 cm power spectrum upper limits 
    Wilensky, Michael J.; Kennedy, Fraser; Bull, Philip; Dillon, Joshua S.; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Burba, Jacob; Carey, Steven; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Eksteen, Nico; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kariseb, MacCalvin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Liu, Adrian; Loots, Anita; MacMahon, David Harold Edward; Malan, Lourence; Malgas, Cresshim; Malgas, Keith; Marero, Bradley; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nuwegeld, Hans; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Sims, Peter; Swarts, Hilton; Thyagarajan, Nithyanandan; van Wyngaarden, Pieter; Williams, Peter K. G.; Zheng, Haoxuan (2023)
    We present a Bayesian jackknife test for assessing the probability that a data set contains biased subsets, and, if so, which of the subsets are likely to be biased. The test can be used to assess the presence and likely ...
  • Characterization of inpaint residuals in interferometric measurements of the epoch of reionization 
    Pagano, Michael; Liu, Jing; Liu, Adrian; Kern, Nicholas S.; Ewall-Wice, Aaron; Bull, Philip; Pascua, Robert; Ravanbakhsh, Siamak; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Burba, Jacob; Carey, Steven; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Dillon, Joshua S.; Eksteen, Nico; Ely, John; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kariseb, MacCalvin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Loots, Anita; MacMahon, David Harold Edward; Malan, Lourence; Malgas, Cresshim; Malgas, Keith; Marero, Bradley; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Neben, Abraham R.; Nikolic, Bojan; Nuwegeld, Hans; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Sims, Peter; Smith, Craig; Swarts, Hilton; Thyagarajan, Nithyanandan; van Wyngaarden, Pieter; Williams, Peter K. G.; Zheng, Haoxuan (2023)
    To mitigate the effects of Radio Frequency Interference (RFI) on the data analysis pipelines of 21 cm interferometric instruments, numerous inpaint techniques have been developed. In this paper, we examine the qualitative ...
  • Detection of cosmic structures using the bispectrum phase. II. First results from application to cosmic reionization using the Hydrogen Epoch of Reionization Array 
    Thyagarajan, Nithyanandan; Carilli, Chris L.; Nikolic, Bojan; Kent, James; Mesinger, Andrei; Kern, Nicholas S.; Bernardi, Gianni; Matika, Siyanda; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Burba, Jacob; Carey, Steve; Cheng, Carina; DeBoer, David R.; Dexter, Matt; Acedo, Eloy de Lera; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; Lewis, David; Liu, Adrian; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Neben, Abraham R.; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Sims, Peter; Smith, Craig; Syce, Angelo; Williams, Peter K. G.; Zheng, Haoxuan (2020)
    Characterizing the epoch of reionization (EoR) at z ?6 via the redshifted 21 cm line of neutral Hydrogen (H I) is critical to modern astrophysics and cosmology, and thus a key science goal of many current and planned ...
  • Direct Optimal Mapping for 21 cm Cosmology: A Demonstration with the Hydrogen Epoch of Reionization Array 
    Xu, Zhilei; Hewitt, Jacqueline N.; Chen, Kai-Feng; Kim, Honggeun; Dillon, Joshua S.; Kern, Nicholas S.; Morales, Miguel F.; Hazelton, Bryna J.; Byrne, Ruby; Fagnoni, Nicolas; Acedo, Eloy de Lera; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Dexter, Matt; Eksteen, Nico; Ely, John; Ewall-Wice, Aaron; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kariseb, MacCalvin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Liu, Adrian; Loots, Anita; Ma, Yin-Zhe; Edward MacMahon, David Harold; Malan, Lourence; Malgas, Cresshim; Malgas, Keith; Marero, Bradley; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nuwegeld, Hans; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Sims, Peter; Smith, Craig; Swarts, Hilton; Thyagarajan, Nithyanandan; Van Wyngaarden, Pieter; Williams, Peter K. G.; Zheng, Haoxuan; HERA Collaboration (2022)
    Motivated by the desire for wide-field images with well-defined statistical properties for 21 cm cosmology, we implement an optimal mapping pipeline that computes a maximum likelihood estimator for the sky using the ...
  • Effects of model incompleteness on the drift-scan calibration of radio telescopes 
    Gehlot, Bharat K.; Jacobs, Daniel C.; Bowman, Judd D.; Mahesh, Nivedita; Murray, Steven G.; Kolopanis, Matthew; Beardsley, Adam P.; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Bernardi, Gianni; Billings, Tashalee S.; Bradley, Richard F.; Bull, Phil; Burba, Jacob; Carey, Steve; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Julius, Austin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; Lewis, David; Liu, Adrian; Ma, Yin-Zhe; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Molewa, Mathakane; Monsalve, Raul A.; Morales, Miguel F.; Mosiane, Tshegofalang; Neben, Abraham R.; Nikolic, Bojan; Parsons, Aaron R.; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Smith, Craig; Syce, Angelo; Tegmark, Max; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2021)
    Precision calibration poses challenges to experiments probing the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn and Epoch of Reionization (z ~ 30-6). In both interferometric and global signal experiments, ...
  • First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum 
    Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steve; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Dibblee-Barkman, Taylor; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; Lewis, David; Liu, Adrian; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Parsons, Aaron R.; Patra, Nipanjana; Pascua, Robert; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Sims, Peter; Singh, Saurabh; Smith, Craig; Syce, Angelo; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan; HERA Collaboration (2022)
    We report upper limits on the Epoch of Reionization 21 cm power spectrum at redshifts 7.9 and 10.4 with 18 nights of data (~36 hr of integration) from Phase I of the Hydrogen Epoch of Reionization Array (HERA). The Phase ...
  • Foreground modelling via Gaussian process regression: an application to HERA data 
    Ghosh, Abhik; Mertens, Florent; Bernardi, Gianni; Santos, Mário G.; Kern, Nicholas S.; Carilli, Christopher L.; Grobler, Trienko L.; Koopmans, Léon V. E.; Jacobs, Daniel C.; Liu, Adrian; Parsons, Aaron R.; Morales, Miguel F.; Aguirre, James E.; Dillon, Joshua S.; Hazelton, Bryna J.; Smirnov, Oleg M.; Gehlot, Bharat K.; Matika, Siyanda; Alexander, Paul; Ali, Zaki S.; Beardsley, Adam P.; Benefo, Roshan K.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Cheng, Carina; Chichura, Paul M.; DeBoer, David R.; Acedo, Eloy de Lera; Ewall-Wice, Aaron; Fadana, Gcobisa; Fagnoni, Nicolas; Fortino, Austin F.; Fritz, Randall; Furlanetto, Steve R.; Gallardo, Samavarti; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Hickish, Jack; Josaitis, Alec; Julius, Austin; Igarashi, Amy S.; Kariseb, MacCalvin; Kohn, Saul A.; Kolopanis, Matthew; Lekalake, Telalo; Loots, Anita; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Mathison, Nathan; Matsetela, Eunice; Mesinger, Andrei; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Patra, Nipanjana; Pieterse, Samantha; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Sell, Raddwine; Smith, Craig; Syce, Angelo; Tegmark, Max; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2020)
    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 ...
  • HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization 
    Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Barkana, Rennan; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steve; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fialkov, Anastasia; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Heimersheim, Stefan; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; Lewis, David; Liu, Adrian; Ma, Yin-Zhe; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Mirocha, Jordan; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Muñoz, Julian B.; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Qin, Yuxiang; Razavi-Ghods, Nima; Reis, Itamar; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sikder, Sudipta; Sims, Peter; Smith, Craig; Syce, Angelo; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2022)
    Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the experiment&#39;s first upper limits on the power spectrum of 21 cm fluctuations at z ~ 8 and 10. Here, we use several independent theoretical models ...
  • Imaging and Modeling Data from the Hydrogen Epoch of Reionization Array 
    Carilli, C. L.; Thyagarajan, N.; Kent, J.; Nikolic, B.; Gale-Sides, K.; Kern, N. S.; Bernardi, G.; Mesinger, A.; Matika, S.; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Phil; Burba, Jacob; Cheng, Carina; DeBoer, David R.; Dexter, Matt; Acedo, Eloy de Lera; Dillon, Joshua S.; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steve R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Josaitis, Alec; Julius, Austin; Kerrigan, Joshua; Kim, Honggeun; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; Liu, Adrian; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Neben, Abraham R.; Parra, Juan Mena; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Sims, Peter; Syce, Angelo; Williams, Peter K. G.; Zheng, Haoxuan (2020)
    We analyze data from the Hydrogen Epoch of Reionization Array (HERA). This is the third in a series of papers on the closure phase delay spectrum technique designed to detect the H I 21 cm emission from cosmic reionization. ...
  • Impact of instrument and data characteristics in the interferometric reconstruction of the 21 cm power spectrum 
    Gorce, Adélie; Ganjam, Samskruthi; Liu, Adrian; Murray, Steven G.; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Acedo, Eloy de Lera; Dexter, Matt; Dillon, Joshua S.; Eksteen, Nico; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kariseb, MacCalvin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; Plante, Paul La; Loots, Anita; MacMahon, David Harold Edward; Malan, Lourence; Malgas, Cresshim; Malgas, Keith; Marero, Bradley; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Neben, Abraham R.; Nikolic, Bojan; Nuwegeld, Hans; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Sims, Peter; Swarts, Hilton; Thyagarajan, Nithyanandan; van Wyngaarden, Pieter; Williams, Peter K. G.; Zheng, Haoxuan (2023)
    Combining the visibilities measured by an interferometer to form a cosmological power spectrum is a complicated process. In a delay-based analysis, the mapping between instrumental and cosmological space is not a one-to-one ...
  • Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations 
    HERA Collaboration; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Barkana, Rennan; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Breitman, Daniela; Bull, Philip; Burba, Jacob; Carey, Steve; Carilli, Chris L.; Cheng, Carina; Choudhuri, Samir; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fialkov, Anastasia; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Garsden, Hugh; Glendenning, Brian; Gorce, Adélie; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Heimersheim, Stefan; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lewis, David; Liu, Adrian; Loots, Anita; Ma, Yin-Zhe; MacMahon, David H. E.; Malan, Lourence; Malgas, Keith; Malgas, Cresshim; Maree, Matthys; Marero, Bradley; Martinot, Zachary E.; McBride, Lisa; Mesinger, Andrei; Mirocha, Jordan; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Muñoz, Julian B.; Murray, Steven G.; Nagpal, Vighnesh; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Nuwegeld, Hans; Parsons, Aaron R.; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Qin, Yuxiang; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Singh, Saurabh; Smith, Craig; Swarts, Hilton; Tan, Jianrong; Thyagarajan, Nithyanandan; Wilensky, Michael J.; Williams, Peter K. G.; van Wyngaarden, Pieter; Zheng, Haoxuan (2023)
    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 ...
  • Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations 
    HERA Collaboration; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Barkana, Rennan; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Breitman, Daniela; Bull, Philip; Burba, Jacob; Carey, Steve; Carilli, Chris L.; Cheng, Carina; Choudhuri, Samir; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fialkov, Anastasia; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Garsden, Hugh; Glendenning, Brian; Gorce, Adélie; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Heimersheim, Stefan; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kern, Nicholas S.; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lewis, David; Liu, Adrian; Loots, Anita; Ma, Yin-Zhe; MacMahon, David H. E.; Malan, Lourence; Malgas, Keith; Malgas, Cresshim; Maree, Matthys; Marero, Bradley; Martinot, Zachary E.; McBride, Lisa; Mesinger, Andrei; Mirocha, Jordan; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Muñoz, Julian B.; Murray, Steven G.; Nagpal, Vighnesh; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Nuwegeld, Hans; Parsons, Aaron R.; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Qin, Yuxiang; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Singh, Saurabh; Smith, Craig; Swarts, Hilton; Tan, Jianrong; Thyagarajan, Nithyanandan; Wilensky, Michael J.; Williams, Peter K. G.; van Wyngaarden, Pieter; Zheng, Haoxuan (2023)
    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 ...
  • Measuring HERA&#39;s Primary Beam in Situ: Methodology and First Results 
    Nunhokee, Chuneeta D.; Parsons, Aaron R.; Kern, Nicholas S.; Nikolic, Bojan; Pober, Jonathan C.; Bernardi, Gianni; Carilli, Chris L.; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Burba, Jacob; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Dillon, Joshua S.; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steve R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Jacobs, Daniel C.; Julius, Austin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; L Plante, Paul; Lekalake, Telalo; Liu, Adrian; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Neben, Abraham R.; Patra, Nipanjana; Pieterse, Samantha; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Sims, Peter; Smith, Craig; Syce, Angelo; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2020)
    The central challenge in 21 cm cosmology is isolating the cosmological signal from bright foregrounds. Many separation techniques rely on the accurate knowledge of the sky and the instrumental response, including the antenna ...
  • Methods of Error Estimation for Delay Power Spectra in 21 cm Cosmology 
    Tan, Jianrong; Liu, Adrian; Kern, Nicholas S.; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Balfour, Yanga; Beardsley, Adam P.; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Carilli, Christopher L.; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Dillon, Joshua S.; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steve R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; La Plante, Paul; Lekalake, Telalo; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nikolic, Bojan; Nunhokee, Chuneeta D.; Parsons, Aaron R.; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Sims, Peter; Singh, Saurabh; Smith, Craig; Syce, Angelo; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2021)
    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 ...
  • Redundant-baseline calibration of the hydrogen epoch of reionization array 
    Dillon, Joshua S.; Lee, Max; Ali, Zaki S.; Parsons, Aaron R.; Orosz, Naomi; Nunhokee, Chuneeta Devi; La Plante, Paul; Beardsley, Adam P.; Kern, Nicholas S.; Abdurashidova, Zara; Aguirre, James E.; Alexander, Paul; Balfour, Yanga; Bernardi, Gianni; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Phil; Burba, Jacob; Carey, Steve; Carilli, Chris L.; Cheng, Carina; DeBoer, David R.; Dexter, Matt; de Lera Acedo, Eloy; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hazelton, Bryna J.; Hewitt, Jacqueline N.; Hickish, Jack; Jacobs, Daniel C.; Julius, Austin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; Lekalake, Telalo; Lewis, David; Liu, Adrian; Ma, Yin-Zhe; MacMahon, David; Malan, Lourence; Malgas, Cresshim; Maree, Matthys; Martinot, Zachary E.; Matsetela, Eunice; Mesinger, Andrei; Molewa, Mathakane; Morales, Miguel F.; Mosiane, Tshegofalang; Murray, Steven; Neben, Abraham R.; Nikolic, Bojan; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Ringuette, Jon; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Smith, Craig; Syce, Angelo; Tegmark, Max; Thyagarajan, Nithyanandan; Williams, Peter K. G.; Zheng, Haoxuan (2020)
    In 21-cm cosmology, precision calibration is key to the separation of the neutral hydrogen signal from very bright but spectrally smooth astrophysical foregrounds. The Hydrogen Epoch of Reionization Array (HERA), an ...
  • Search for the Epoch of Reionization with HERA: upper limits on the closure phase delay power spectrum 
    Keller, Pascal M.; Nikolic, Bojan; Thyagarajan, Nithyanandan; Carilli, Chris L.; Bernardi, Gianni; Charles, Ntsikelelo; Bester, Landman; Smirnov, Oleg M.; Kern, Nicholas S.; Dillon, Joshua S.; Hazelton, Bryna J.; Morales, Miguel F.; Jacobs, Daniel C.; Parsons, Aaron R.; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Beardsley, Adam P.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Cheng, Carina; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Eksteen, Nico; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hewitt, Jacqueline N.; Hickish, Jack; Julius, Austin; Kariseb, MacCalvin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; Plante, Paul La; Liu, Adrian; Loots, Anita; Ma, Yin-Zhe; MacMahon, David Harold Edward; Malan, Lourence; Malgas, Cresshim; Malgas, Keith; Marero, Bradley; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nuwegeld, Hans; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Smith, Craig; Swarts, Hilton; Van Wyngaarden, Pieter; Williams, Peter K. G.; Zheng, Haoxuan (2023)
    Radio interferometers aiming to measure the power spectrum of the redshifted 21 cm line during the Epoch of Reionization (EoR) need to achieve an unprecedented dynamic range to separate the weak signal from overwhelming ...
  • Search for the Epoch of Reionization with HERA: upper limits on the closure phase delay power spectrum 
    Keller, Pascal M.; Nikolic, Bojan; Thyagarajan, Nithyanandan; Carilli, Chris L.; Bernardi, Gianni; Charles, Ntsikelelo; Bester, Landman; Smirnov, Oleg M.; Kern, Nicholas S.; Dillon, Joshua S.; Hazelton, Bryna J.; Morales, Miguel F.; Jacobs, Daniel C.; Parsons, Aaron R.; Abdurashidova, Zara; Adams, Tyrone; Aguirre, James E.; Alexander, Paul; Ali, Zaki S.; Baartman, Rushelle; Balfour, Yanga; Beardsley, Adam P.; Billings, Tashalee S.; Bowman, Judd D.; Bradley, Richard F.; Bull, Philip; Burba, Jacob; Carey, Steven; Cheng, Carina; DeBoer, David R.; de Lera Acedo, Eloy; Dexter, Matt; Eksteen, Nico; Ely, John; Ewall-Wice, Aaron; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steven R.; Gale-Sides, Kingsley; Glendenning, Brian; Gorthi, Deepthi; Greig, Bradley; Grobbelaar, Jasper; Halday, Ziyaad; Hewitt, Jacqueline N.; Hickish, Jack; Julius, Austin; Kariseb, MacCalvin; Kerrigan, Joshua; Kittiwisit, Piyanat; Kohn, Saul A.; Kolopanis, Matthew; Lanman, Adam; Plante, Paul La; Liu, Adrian; Loots, Anita; Ma, Yin-Zhe; MacMahon, David Harold Edward; Malan, Lourence; Malgas, Cresshim; Malgas, Keith; Marero, Bradley; Martinot, Zachary E.; Mesinger, Andrei; Molewa, Mathakane; Mosiane, Tshegofalang; Murray, Steven G.; Neben, Abraham R.; Nuwegeld, Hans; Pascua, Robert; Patra, Nipanjana; Pieterse, Samantha; Pober, Jonathan C.; Razavi-Ghods, Nima; Robnett, James; Rosie, Kathryn; Santos, Mario G.; Sims, Peter; Smith, Craig; Swarts, Hilton; Van Wyngaarden, Pieter; Williams, Peter K. G.; Zheng, Haoxuan (2023)
    Radio interferometers aiming to measure the power spectrum of the redshifted 21 cm line during the Epoch of Reionization (EoR) need to achieve an unprecedented dynamic range to separate the weak signal from overwhelming ...

Search DSpace

Browse

My Account