First season MWA EoR power spectrum results at redshift 7

The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce several novel analysis techniques, such as cable re...

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Main Authors:	Beardsley, A., Hazelton, B., Sullivan, I., Carroll, P., Barry, N., Rahimi, M., Pindor, B., Trott, Cathryn, Line, J., Jacobs, D., Morales, M., Pober, J., Bernardi, G., Bowman, J., Busch, M., Briggs, F., Cappallo, R., Corey, B., Oliveira-Costa, A., Dillon, J., Emrich, David, Ewall-Wice, A., Feng, L., Gaensler, B., Goeke, R., Greenhill, L., Hewitt, J., Hurley-Walker, Natasha, Johnston-Hollitt, M., Kaplan, D., Kasper, J., Kim, H., Kratzenberg, E., Lenc, E., Loeb, A., Lonsdale, C., Lynch, Mervyn, McKinley, B., McWhirter, S., Mitchell, D., Morgan, E., Neben, A., Thyagarajan, N., Oberoi, D., Offringa, A., Ord, S., Paul, S., Prabu, T., Procopio, P., Riding, J., Rogers, A., Roshi, A., Shankar, N., Sethi, S., Srivani, K., Subrahmanyan, R., Tegmark, M., Tingay, Steven, Waterson, M., Wayth, Randall, Webster, R., Whitney, A., Williams, Andrew, Williams, C., Wu, C., Wyithe, J.
Format:	Journal Article
Published:	Institute of Physics Publishing 2016
Online Access:	http://hdl.handle.net/20.500.11937/21766

_version_	1848750681783009280
author	Beardsley, A. Hazelton, B. Sullivan, I. Carroll, P. Barry, N. Rahimi, M. Pindor, B. Trott, Cathryn Line, J. Jacobs, D. Morales, M. Pober, J. Bernardi, G. Bowman, J. Busch, M. Briggs, F. Cappallo, R. Corey, B. Oliveira-Costa, A. Dillon, J. Emrich, David Ewall-Wice, A. Feng, L. Gaensler, B. Goeke, R. Greenhill, L. Hewitt, J. Hurley-Walker, Natasha Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kim, H. Kratzenberg, E. Lenc, E. Loeb, A. Lonsdale, C. Lynch, Mervyn McKinley, B. McWhirter, S. Mitchell, D. Morgan, E. Neben, A. Thyagarajan, N. Oberoi, D. Offringa, A. Ord, S. Paul, S. Prabu, T. Procopio, P. Riding, J. Rogers, A. Roshi, A. Shankar, N. Sethi, S. Srivani, K. Subrahmanyan, R. Tegmark, M. Tingay, Steven Waterson, M. Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. Wu, C. Wyithe, J.
author_facet	Beardsley, A. Hazelton, B. Sullivan, I. Carroll, P. Barry, N. Rahimi, M. Pindor, B. Trott, Cathryn Line, J. Jacobs, D. Morales, M. Pober, J. Bernardi, G. Bowman, J. Busch, M. Briggs, F. Cappallo, R. Corey, B. Oliveira-Costa, A. Dillon, J. Emrich, David Ewall-Wice, A. Feng, L. Gaensler, B. Goeke, R. Greenhill, L. Hewitt, J. Hurley-Walker, Natasha Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kim, H. Kratzenberg, E. Lenc, E. Loeb, A. Lonsdale, C. Lynch, Mervyn McKinley, B. McWhirter, S. Mitchell, D. Morgan, E. Neben, A. Thyagarajan, N. Oberoi, D. Offringa, A. Ord, S. Paul, S. Prabu, T. Procopio, P. Riding, J. Rogers, A. Roshi, A. Shankar, N. Sethi, S. Srivani, K. Subrahmanyan, R. Tegmark, M. Tingay, Steven Waterson, M. Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. Wu, C. Wyithe, J.
author_sort	Beardsley, A.
building	Curtin Institutional Repository
collection	Online Access
description	The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce several novel analysis techniques, such as cable reflection calibration, hyper-resolution gridding kernels, diffuse foreground model subtraction, and quality control methods. Each change to the analysis pipeline is tested against a two-dimensional power spectrum figure of merit to demonstrate improvement. We incorporate the new techniques into a deep integration of 32 hours of MWA data. This data set is used to place a systematic-limited upper limit on the cosmological power spectrum of ∆2 ≤ 2.7×104 mK2 at k =0.27 h Mpc-1 and z = 7.1, consistent with other published limits, and a modest improvement (factor of 1.4) over previous MWA results. From this deep analysis, we have identified a list of improvements to be made to our EoR data analysis strategies. These improvements will be implemented in the future and detailed in upcoming publications.
first_indexed	2025-11-14T07:40:42Z
format	Journal Article
id	curtin-20.500.11937-21766
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T07:40:42Z
publishDate	2016
publisher	Institute of Physics Publishing
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-217662019-02-19T05:35:05Z First season MWA EoR power spectrum results at redshift 7 Beardsley, A. Hazelton, B. Sullivan, I. Carroll, P. Barry, N. Rahimi, M. Pindor, B. Trott, Cathryn Line, J. Jacobs, D. Morales, M. Pober, J. Bernardi, G. Bowman, J. Busch, M. Briggs, F. Cappallo, R. Corey, B. Oliveira-Costa, A. Dillon, J. Emrich, David Ewall-Wice, A. Feng, L. Gaensler, B. Goeke, R. Greenhill, L. Hewitt, J. Hurley-Walker, Natasha Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kim, H. Kratzenberg, E. Lenc, E. Loeb, A. Lonsdale, C. Lynch, Mervyn McKinley, B. McWhirter, S. Mitchell, D. Morgan, E. Neben, A. Thyagarajan, N. Oberoi, D. Offringa, A. Ord, S. Paul, S. Prabu, T. Procopio, P. Riding, J. Rogers, A. Roshi, A. Shankar, N. Sethi, S. Srivani, K. Subrahmanyan, R. Tegmark, M. Tingay, Steven Waterson, M. Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. Wu, C. Wyithe, J. The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce several novel analysis techniques, such as cable reflection calibration, hyper-resolution gridding kernels, diffuse foreground model subtraction, and quality control methods. Each change to the analysis pipeline is tested against a two-dimensional power spectrum figure of merit to demonstrate improvement. We incorporate the new techniques into a deep integration of 32 hours of MWA data. This data set is used to place a systematic-limited upper limit on the cosmological power spectrum of ∆2 ≤ 2.7×104 mK2 at k =0.27 h Mpc-1 and z = 7.1, consistent with other published limits, and a modest improvement (factor of 1.4) over previous MWA results. From this deep analysis, we have identified a list of improvements to be made to our EoR data analysis strategies. These improvements will be implemented in the future and detailed in upcoming publications. 2016 Journal Article http://hdl.handle.net/20.500.11937/21766 10.3847/1538-4357/833/1/102 Institute of Physics Publishing fulltext
spellingShingle	Beardsley, A. Hazelton, B. Sullivan, I. Carroll, P. Barry, N. Rahimi, M. Pindor, B. Trott, Cathryn Line, J. Jacobs, D. Morales, M. Pober, J. Bernardi, G. Bowman, J. Busch, M. Briggs, F. Cappallo, R. Corey, B. Oliveira-Costa, A. Dillon, J. Emrich, David Ewall-Wice, A. Feng, L. Gaensler, B. Goeke, R. Greenhill, L. Hewitt, J. Hurley-Walker, Natasha Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kim, H. Kratzenberg, E. Lenc, E. Loeb, A. Lonsdale, C. Lynch, Mervyn McKinley, B. McWhirter, S. Mitchell, D. Morgan, E. Neben, A. Thyagarajan, N. Oberoi, D. Offringa, A. Ord, S. Paul, S. Prabu, T. Procopio, P. Riding, J. Rogers, A. Roshi, A. Shankar, N. Sethi, S. Srivani, K. Subrahmanyan, R. Tegmark, M. Tingay, Steven Waterson, M. Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. Wu, C. Wyithe, J. First season MWA EoR power spectrum results at redshift 7
title	First season MWA EoR power spectrum results at redshift 7
title_full	First season MWA EoR power spectrum results at redshift 7
title_fullStr	First season MWA EoR power spectrum results at redshift 7
title_full_unstemmed	First season MWA EoR power spectrum results at redshift 7
title_short	First season MWA EoR power spectrum results at redshift 7
title_sort	first season mwa eor power spectrum results at redshift 7
url	http://hdl.handle.net/20.500.11937/21766

First season MWA EoR power spectrum results at redshift 7

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