First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7

W. Li; J. C. Pober; N. Barry; B. J. Hazelton; M. F. Morales; C. M. Trott; A. Lanman; M. Wilensky; I. Sullivan; A. P. Beardsley; T. Booler; J. D. Bowman; R. Byrne; B. Crosse; D. Emrich; T. M.O. Franzen; K. Hasegawa; L. Horsley; M. Johnston-Hollitt; D. C. Jacobs; C. H. Jordan; R. C. Joseph; T. Kaneuji; D. L. Kaplan; D. Kenney; K. Kubota; J. Line; C. Lynch; B. McKinley; D. A. Mitchell; S. Murray; D. Pallot; B. Pindor; M. Rahimi; J. Riding; G. Sleap; K. Steele; K. Takahashi; S. J. Tingay; M. Walker; R. B. Wayth; R. L. Webster; A. Williams; C. Wu; J. S.B. Wyithe; S. Yoshiura; Q. Zheng

doi:10.3847/1538-4357/ab55e4

First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7

W. Li, J. C. Pober, N. Barry, B. J. Hazelton, M. F. Morales, C. M. Trott, A. Lanman, M. Wilensky, I. Sullivan, A. P. Beardsley, T. Booler, J. D. Bowman, R. Byrne, B. Crosse, D. Emrich, T. M.O. Franzen, K. Hasegawa, L. Horsley, M. Johnston-Hollitt, D. C. JacobsC. H. Jordan, R. C. Joseph, T. Kaneuji, D. L. Kaplan, D. Kenney, K. Kubota, J. Line, C. Lynch, B. McKinley, D. A. Mitchell, S. Murray, D. Pallot, B. Pindor, M. Rahimi, J. Riding, G. Sleap, K. Steele, K. Takahashi, S. J. Tingay, M. Walker, R. B. Wayth, R. L. Webster, A. Williams, C. Wu, J. S.B. Wyithe, S. Yoshiura, Q. Zheng

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and redundant interferometric calibration. The highly redundant hexagonal cores give improved power spectrum sensitivity. In this paper, we present the analysis of nearly 40 hr of data targeting one of the MWA's epoch of reionization (EoR) fields observed in 2016. We use both improved analysis techniques presented in Barry et al. and several additional techniques developed for this work, including data quality control methods and interferometric calibration approaches. We show the EoR power spectrum limits at redshift 6.5, 6.8, and 7.1 based on our deep analysis on this 40 hr data set. These limits span a range in k-space of 0.18 h Mpc^-1 < k < 1.6 h Mpc^-1, with a lowest measurement of Δ² ≤ 2.39 × 10³ mK² at k = 0.59 h Mpc^-1 and z = 6.5.

Original language	English (US)
Article number	141
Journal	Astrophysical Journal
Volume	887
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ab55e4
State	Published - Dec 20 2019

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/ab55e4

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Li, W., Pober, J. C., Barry, N., Hazelton, B. J., Morales, M. F., Trott, C. M., Lanman, A., Wilensky, M., Sullivan, I., Beardsley, A. P., Booler, T., Bowman, J. D., Byrne, R., Crosse, B., Emrich, D., Franzen, T. M. O., Hasegawa, K., Horsley, L., Johnston-Hollitt, M., ... Zheng, Q. (2019). First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7. Astrophysical Journal, 887(2), Article 141. https://doi.org/10.3847/1538-4357/ab55e4

Li, W, Pober, JC, Barry, N, Hazelton, BJ, Morales, MF, Trott, CM, Lanman, A, Wilensky, M, Sullivan, I, Beardsley, AP, Booler, T, Bowman, JD, Byrne, R, Crosse, B, Emrich, D, Franzen, TMO, Hasegawa, K, Horsley, L, Johnston-Hollitt, M, Jacobs, DC, Jordan, CH, Joseph, RC, Kaneuji, T, Kaplan, DL, Kenney, D, Kubota, K, Line, J, Lynch, C, McKinley, B, Mitchell, DA, Murray, S, Pallot, D, Pindor, B, Rahimi, M, Riding, J, Sleap, G, Steele, K, Takahashi, K, Tingay, SJ, Walker, M, Wayth, RB, Webster, RL, Williams, A, Wu, C, Wyithe, JSB, Yoshiura, S & Zheng, Q 2019, 'First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7', Astrophysical Journal, vol. 887, no. 2, 141. https://doi.org/10.3847/1538-4357/ab55e4

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title = "First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7",

abstract = "The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and redundant interferometric calibration. The highly redundant hexagonal cores give improved power spectrum sensitivity. In this paper, we present the analysis of nearly 40 hr of data targeting one of the MWA's epoch of reionization (EoR) fields observed in 2016. We use both improved analysis techniques presented in Barry et al. and several additional techniques developed for this work, including data quality control methods and interferometric calibration approaches. We show the EoR power spectrum limits at redshift 6.5, 6.8, and 7.1 based on our deep analysis on this 40 hr data set. These limits span a range in k-space of 0.18 h Mpc-1 < k < 1.6 h Mpc-1, with a lowest measurement of Δ2 ≤ 2.39 × 103 mK2 at k = 0.59 h Mpc-1 and z = 6.5.",

author = "W. Li and Pober, {J. C.} and N. Barry and Hazelton, {B. J.} and Morales, {M. F.} and Trott, {C. M.} and A. Lanman and M. Wilensky and I. Sullivan and Beardsley, {A. P.} and T. Booler and Bowman, {J. D.} and R. Byrne and B. Crosse and D. Emrich and Franzen, {T. M.O.} and K. Hasegawa and L. Horsley and M. Johnston-Hollitt and Jacobs, {D. C.} and Jordan, {C. H.} and Joseph, {R. C.} and T. Kaneuji and Kaplan, {D. L.} and D. Kenney and K. Kubota and J. Line and C. Lynch and B. McKinley and Mitchell, {D. A.} and S. Murray and D. Pallot and B. Pindor and M. Rahimi and J. Riding and G. Sleap and K. Steele and K. Takahashi and Tingay, {S. J.} and M. Walker and Wayth, {R. B.} and Webster, {R. L.} and A. Williams and C. Wu and Wyithe, {J. S.B.} and S. Yoshiura and Q. Zheng",

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doi = "10.3847/1538-4357/ab55e4",

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T1 - First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7

AU - Li, W.

AU - Pober, J. C.

AU - Barry, N.

AU - Hazelton, B. J.

AU - Morales, M. F.

AU - Trott, C. M.

AU - Lanman, A.

AU - Wilensky, M.

AU - Sullivan, I.

AU - Beardsley, A. P.

AU - Booler, T.

AU - Bowman, J. D.

AU - Byrne, R.

AU - Crosse, B.

AU - Emrich, D.

AU - Franzen, T. M.O.

AU - Hasegawa, K.

AU - Horsley, L.

AU - Johnston-Hollitt, M.

AU - Jacobs, D. C.

AU - Jordan, C. H.

AU - Joseph, R. C.

AU - Kaneuji, T.

AU - Kaplan, D. L.

AU - Kenney, D.

AU - Kubota, K.

AU - Line, J.

AU - Lynch, C.

AU - McKinley, B.

AU - Mitchell, D. A.

AU - Murray, S.

AU - Pallot, D.

AU - Pindor, B.

AU - Rahimi, M.

AU - Riding, J.

AU - Sleap, G.

AU - Steele, K.

AU - Takahashi, K.

AU - Tingay, S. J.

AU - Walker, M.

AU - Wayth, R. B.

AU - Webster, R. L.

AU - Williams, A.

AU - Wu, C.

AU - Wyithe, J. S.B.

AU - Yoshiura, S.

AU - Zheng, Q.

PY - 2019/12/20

Y1 - 2019/12/20

N2 - The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and redundant interferometric calibration. The highly redundant hexagonal cores give improved power spectrum sensitivity. In this paper, we present the analysis of nearly 40 hr of data targeting one of the MWA's epoch of reionization (EoR) fields observed in 2016. We use both improved analysis techniques presented in Barry et al. and several additional techniques developed for this work, including data quality control methods and interferometric calibration approaches. We show the EoR power spectrum limits at redshift 6.5, 6.8, and 7.1 based on our deep analysis on this 40 hr data set. These limits span a range in k-space of 0.18 h Mpc-1 < k < 1.6 h Mpc-1, with a lowest measurement of Δ2 ≤ 2.39 × 103 mK2 at k = 0.59 h Mpc-1 and z = 6.5.

AB - The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and redundant interferometric calibration. The highly redundant hexagonal cores give improved power spectrum sensitivity. In this paper, we present the analysis of nearly 40 hr of data targeting one of the MWA's epoch of reionization (EoR) fields observed in 2016. We use both improved analysis techniques presented in Barry et al. and several additional techniques developed for this work, including data quality control methods and interferometric calibration approaches. We show the EoR power spectrum limits at redshift 6.5, 6.8, and 7.1 based on our deep analysis on this 40 hr data set. These limits span a range in k-space of 0.18 h Mpc-1 < k < 1.6 h Mpc-1, with a lowest measurement of Δ2 ≤ 2.39 × 103 mK2 at k = 0.59 h Mpc-1 and z = 6.5.

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U2 - 10.3847/1538-4357/ab55e4

DO - 10.3847/1538-4357/ab55e4

M3 - Article

AN - SCOPUS:85077580203

SN - 0004-637X

VL - 887

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 141

ER -

First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7

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