1. First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7
- Author
-
Adam Lanman, J. L. B. Line, Cathryn M. Trott, Miguel F. Morales, Jonathan C. Pober, Christene Lynch, Bryna J. Hazelton, R. C. Joseph, R. Byrne, Judd D. Bowman, Daniel Jacobs, B. Pindor, Christopher H. Jordan, David L. Kaplan, A. P. Beardsley, D. Kenney, Tom Booler, Kenji Kubota, Melanie Johnston-Hollitt, S. S. Murray, Steven Tingay, T. M. O. Franzen, M. Wilensky, Andrew R. Williams, Chen Wu, Rachel L. Webster, S. Yoshiura, M. Walker, D. Pallot, Daniel A. Mitchell, G. Sleap, Qinghua Zheng, Keitaro Takahashi, David Emrich, L. Horsley, Kenji Hasegawa, Brian Crosse, K. Steele, J. Riding, B. McKinley, Ian Sullivan, Nichole Barry, Wenyang Li, R. B. Wayth, J. S. B. Wyithe, T. Kaneuji, and M. Rahimi
- Subjects
Physics ,010504 meteorology & atmospheric sciences ,Phase (waves) ,Spectral density ,Astronomy and Astrophysics ,Murchison Widefield Array ,Astrophysics ,Space (mathematics) ,01 natural sciences ,Redshift ,Interferometry ,Space and Planetary Science ,0103 physical sciences ,Calibration ,Sensitivity (control systems) ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences - 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 hours of data targeting one of the MWA's EoR fields observed in 2016. We use both improved analysis techniques presented in Barry et al. (2019) as well as 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-hour data set. These limits span a range in $k$ space of $0.18$ $h$ $\mathrm{Mpc^{-1}}$ $
- Published
- 2019
- Full Text
- View/download PDF