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Gridded and direct Epoch of Reionisation bispectrum estimates using the Murchison Widefield Array
Cathryn M. Trott, Catherine A. Watkinson, Christopher H. Jordan, Shintaro Yoshiura, Suman Majumdar, N. Barry, R. Byrne, B. J. Hazelton, K. Hasegawa, R. Joseph, T. Kaneuji, K. Kubota, W. Li, J. Line, C. Lynch, B. McKinley, D. A. Mitchell, M. F. Morales, S. Murray, B. Pindor, J. C. Pober, M. Rahimi, J. Riding, K. Takahashi, S. J. Tingay, R. B. Wayth, R. L. Webster, M. Wilensky, J. S. B. Wyithe, Q. Zheng, David Emrich, A. P. Beardsley, T. Booler, B. Crosse, T. M. O. Franzen, L. Horsley, M. Johnston-Hollitt, D. L. Kaplan, D. Kenney, D. Pallot, G. Sleap, K. Steele, M. Walker, A. Williams, C. Wu
Journal: Publications of the Astronomical Society of Australia / Volume 36 / 2019
Published online by Cambridge University Press: 18 July 2019, e023
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We apply two methods to estimate the 21-cm bispectrum from data taken within the Epoch of Reionisation (EoR) project of the Murchison Widefield Array (MWA). Using data acquired with the Phase II compact array allows a direct bispectrum estimate to be undertaken on the multiple redundantly spaced triangles of antenna tiles, as well as an estimate based on data gridded to the uv-plane. The direct and gridded bispectrum estimators are applied to 21 h of high-band (167–197 MHz; z = 6.2–7.5) data from the 2016 and 2017 observing seasons. Analytic predictions for the bispectrum bias and variance for point-source foregrounds are derived. We compare the output of these approaches, the foreground contribution to the signal, and future prospects for measuring the bispectra with redundant and non-redundant arrays. We find that some triangle configurations yield bispectrum estimates that are consistent with the expected noise level after 10 h, while equilateral configurations are strongly foreground-dominated. Careful choice of triangle configurations may be made to reduce foreground bias that hinders power spectrum estimators, and the 21-cm bispectrum may be accessible in less time than the 21-cm power spectrum for some wave modes, with detections in hundreds of hours.

7 - Resilience: An Introduction
- By Christopher T. Emrich, Graham A. Tobin
Edited by Sven Fuchs, Thomas Thaler
Book: Vulnerability and Resilience to Natural Hazards
Published online: 03 March 2018
Print publication: 22 March 2018, pp 124-144
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8 - Recovery Divides in a Changing World
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 164-186
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Plate Section
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp -
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Tables
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp ix-ix
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2 - Remembering the Coast: The Road to Camille
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 15-38
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Contents
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp v-vi
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5 - Powering an Unequal Recovery
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 90-113
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Boxes
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp x-x
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Index
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 191-194
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Hurricane Katrina and the Forgotten Coast of Mississippi - Title page
- By Susan L. Cutter, Christopher T. Emrich, Jerry T. Mitchell, Walter W. Piegorsch, Mark M. Smith, Lynn Weber
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp iii-iii
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Copyright page
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp iv-iv
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Hurricane Katrina and the Forgotten Coast of Mississippi - Half title page
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp i-ii
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1 - The Forgotten Coast
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 1-14
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Acknowledgments
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp xiii-xiv
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3 - The Second Big One
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 39-63
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4 - Uneven Recovery
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 64-89
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7 - Waiting for the Next Katrina
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 141-163
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9 - Epilogue
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp 187-190
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About the Authors
- By Susan L. Cutter, Christopher T. Emrich, Jerry T. Mitchell, Walter W. Piegorsch, Mark M. Smith, Lynn Weber
Susan L. Cutter, University of South Carolina, Christopher T. Emrich, University of South Carolina, Jerry T. Mitchell, University of South Carolina, Walter W. Piegorsch, University of Arizona, Mark M. Smith, University of South Carolina, Lynn Weber, University of South Carolina
Book: Hurricane Katrina and the Forgotten Coast of Mississippi
Published online: 05 April 2014
Print publication: 07 April 2014, pp xi-xii
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Gridded and direct Epoch of Reionisation bispectrum estimates using the Murchison Widefield Array

7 - Resilience: An Introduction

8 - Recovery Divides in a Changing World

Plate Section

Tables

2 - Remembering the Coast: The Road to Camille

Contents

5 - Powering an Unequal Recovery

Boxes

Index

Hurricane Katrina and the Forgotten Coast of Mississippi - Title page

Copyright page

Hurricane Katrina and the Forgotten Coast of Mississippi - Half title page

1 - The Forgotten Coast

Acknowledgments

3 - The Second Big One

4 - Uneven Recovery

7 - Waiting for the Next Katrina

9 - Epilogue

About the Authors

Search Results

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24 results