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| Natura: | Preprint |
| Pubblicazione: |
2023
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2312.09763 |
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| _version_ | 1866909450655236096 |
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| author | Kittiwisit, Piyanat Murray, Steven G. Garsden, Hugh Bull, Philip Cain, Christopher Parsons, Aaron R. Sipple, Jackson Abdurashidova, Zara Adams, Tyrone Aguirre, James E. Alexander, Paul Ali, Zaki S. Baartman, Rushelle Balfour, Yanga Beardsley, Adam P. Berkhout, Lindsay M. Bernardi, Gianni Billings, Tashalee S. Bowman, Judd D. Bradley, Richard F. Burba, Jacob Carey, Steven Carilli, Chris L. Chen, Kai-Feng Cheng, Carina Choudhuri, Samir DeBoer, David R. Acedo, Eloy de Lera Dexter, Matt Dillon, Joshua S. Dynes, Scott Eksteen, Nico Ely, John Ewall-Wice, Aaron Fagnoni, Nicolas Fritz, Randall Furlanetto, Steven R. Gale-Sides, Kingsley Gehlot, Bharat Kumar Ghosh, Abhik Glendenning, Brian Gorce, Adelie Gorthi, Deepthi Greig, Bradley Grobbelaar, Jasper Halday, Ziyaad Hazelton, Bryna J. Hewitt, Jacqueline N. Hickish, Jack Huang, Tian Jacobs, Daniel C. Josaitis, Alec Julius, Austin Kariseb, MacCalvin Kern, Nicholas S. Kerrigan, Joshua Kim, Honggeun Kohn, Saul A. Kolopanis, Matthew Lanman, Adam La Plante, Paul Liu, Adrian Loots, Anita Ma, Yin-Zhe MacMahon, David H. E. 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 Nunhokee, Chuneeta Devi Nuwegeld, Hans Pascua, Robert Patra, Nipanjana Pieterse, Samantha Qin, Yuxiang Rath, Eleanor Razavi-Ghods, Nima Riley, Daniel Robnett, James Rosie, Kathryn Santos, Mario G. Sims, Peter Singh, Saurabh Storer, Dara Swarts, Hilton Tan, Jianrong Thyagarajan, Nithyanandan van Wyngaarden, Pieter Williams, Peter K. G. Xu, Zhilei Zheng, Haoxuan |
| author_facet | Kittiwisit, Piyanat Murray, Steven G. Garsden, Hugh Bull, Philip Cain, Christopher Parsons, Aaron R. Sipple, Jackson Abdurashidova, Zara Adams, Tyrone Aguirre, James E. Alexander, Paul Ali, Zaki S. Baartman, Rushelle Balfour, Yanga Beardsley, Adam P. Berkhout, Lindsay M. Bernardi, Gianni Billings, Tashalee S. Bowman, Judd D. Bradley, Richard F. Burba, Jacob Carey, Steven Carilli, Chris L. Chen, Kai-Feng Cheng, Carina Choudhuri, Samir DeBoer, David R. Acedo, Eloy de Lera Dexter, Matt Dillon, Joshua S. Dynes, Scott Eksteen, Nico Ely, John Ewall-Wice, Aaron Fagnoni, Nicolas Fritz, Randall Furlanetto, Steven R. Gale-Sides, Kingsley Gehlot, Bharat Kumar Ghosh, Abhik Glendenning, Brian Gorce, Adelie Gorthi, Deepthi Greig, Bradley Grobbelaar, Jasper Halday, Ziyaad Hazelton, Bryna J. Hewitt, Jacqueline N. Hickish, Jack Huang, Tian Jacobs, Daniel C. Josaitis, Alec Julius, Austin Kariseb, MacCalvin Kern, Nicholas S. Kerrigan, Joshua Kim, Honggeun Kohn, Saul A. Kolopanis, Matthew Lanman, Adam La Plante, Paul Liu, Adrian Loots, Anita Ma, Yin-Zhe MacMahon, David H. E. 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 Nunhokee, Chuneeta Devi Nuwegeld, Hans Pascua, Robert Patra, Nipanjana Pieterse, Samantha Qin, Yuxiang Rath, Eleanor Razavi-Ghods, Nima Riley, Daniel Robnett, James Rosie, Kathryn Santos, Mario G. Sims, Peter Singh, Saurabh Storer, Dara Swarts, Hilton Tan, Jianrong Thyagarajan, Nithyanandan van Wyngaarden, Pieter Williams, Peter K. G. Xu, Zhilei Zheng, Haoxuan |
| contents | Detection of the faint 21 cm line emission from the Cosmic Dawn and Epoch of Reionisation will require not only exquisite control over instrumental calibration and systematics to achieve the necessary dynamic range of observations but also validation of analysis techniques to demonstrate their statistical properties and signal loss characteristics. A key ingredient in achieving this is the ability to perform high-fidelity simulations of the kinds of data that are produced by the large, many-element, radio interferometric arrays that have been purpose-built for these studies. The large scale of these arrays presents a computational challenge, as one must simulate a detailed sky and instrumental model across many hundreds of frequency channels, thousands of time samples, and tens of thousands of baselines for arrays with hundreds of antennas. In this paper, we present a fast matrix-based method for simulating radio interferometric measurements (visibilities) at the necessary scale. We achieve this through judicious use of primary beam interpolation, fast approximations for coordinate transforms, and a vectorised outer product to expand per-antenna quantities to per-baseline visibilities, coupled with standard parallelisation techniques. We validate the results of this method, implemented in the publicly-available matvis code, against a high-precision reference simulator, and explore its computational scaling on a variety of problems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_09763 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | matvis: A matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays Kittiwisit, Piyanat Murray, Steven G. Garsden, Hugh Bull, Philip Cain, Christopher Parsons, Aaron R. Sipple, Jackson Abdurashidova, Zara Adams, Tyrone Aguirre, James E. Alexander, Paul Ali, Zaki S. Baartman, Rushelle Balfour, Yanga Beardsley, Adam P. Berkhout, Lindsay M. Bernardi, Gianni Billings, Tashalee S. Bowman, Judd D. Bradley, Richard F. Burba, Jacob Carey, Steven Carilli, Chris L. Chen, Kai-Feng Cheng, Carina Choudhuri, Samir DeBoer, David R. Acedo, Eloy de Lera Dexter, Matt Dillon, Joshua S. Dynes, Scott Eksteen, Nico Ely, John Ewall-Wice, Aaron Fagnoni, Nicolas Fritz, Randall Furlanetto, Steven R. Gale-Sides, Kingsley Gehlot, Bharat Kumar Ghosh, Abhik Glendenning, Brian Gorce, Adelie Gorthi, Deepthi Greig, Bradley Grobbelaar, Jasper Halday, Ziyaad Hazelton, Bryna J. Hewitt, Jacqueline N. Hickish, Jack Huang, Tian Jacobs, Daniel C. Josaitis, Alec Julius, Austin Kariseb, MacCalvin Kern, Nicholas S. Kerrigan, Joshua Kim, Honggeun Kohn, Saul A. Kolopanis, Matthew Lanman, Adam La Plante, Paul Liu, Adrian Loots, Anita Ma, Yin-Zhe MacMahon, David H. E. 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 Nunhokee, Chuneeta Devi Nuwegeld, Hans Pascua, Robert Patra, Nipanjana Pieterse, Samantha Qin, Yuxiang Rath, Eleanor Razavi-Ghods, Nima Riley, Daniel Robnett, James Rosie, Kathryn Santos, Mario G. Sims, Peter Singh, Saurabh Storer, Dara Swarts, Hilton Tan, Jianrong Thyagarajan, Nithyanandan van Wyngaarden, Pieter Williams, Peter K. G. Xu, Zhilei Zheng, Haoxuan Instrumentation and Methods for Astrophysics Detection of the faint 21 cm line emission from the Cosmic Dawn and Epoch of Reionisation will require not only exquisite control over instrumental calibration and systematics to achieve the necessary dynamic range of observations but also validation of analysis techniques to demonstrate their statistical properties and signal loss characteristics. A key ingredient in achieving this is the ability to perform high-fidelity simulations of the kinds of data that are produced by the large, many-element, radio interferometric arrays that have been purpose-built for these studies. The large scale of these arrays presents a computational challenge, as one must simulate a detailed sky and instrumental model across many hundreds of frequency channels, thousands of time samples, and tens of thousands of baselines for arrays with hundreds of antennas. In this paper, we present a fast matrix-based method for simulating radio interferometric measurements (visibilities) at the necessary scale. We achieve this through judicious use of primary beam interpolation, fast approximations for coordinate transforms, and a vectorised outer product to expand per-antenna quantities to per-baseline visibilities, coupled with standard parallelisation techniques. We validate the results of this method, implemented in the publicly-available matvis code, against a high-precision reference simulator, and explore its computational scaling on a variety of problems. |
| title | matvis: A matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2312.09763 |