THE MURCHISON WIDEFIELD ARRAY 21 cm POWER SPECTRUM ANALYSIS METHODOLOGY
Author(s)
Jacobs, Daniel C.; Hazelton, B. J.; Trott, C. M.; Pindor, B.; Sullivan, I. S.; Pober, J. C.; Barry, N.; Beardsley, A. P.; Bernardi, G.; Bowman, Judd D.; Briggs, F.; Cappallo, R. J.; Carroll, P.; Emrich, D.; Gaensler, B. M.; Greenhill, L. J.; Hurley-Walker, N.; Johnston-Hollitt, M.; Kaplan, D. L.; Kasper, J. C.; Kim, H. S.; Lenc, E.; Line, J.; Loeb, A.; Lynch, M. J.; McKinley, B.; Mitchell, D.A.; Morales, M. F.; Thyagarajan, N.; Oberoi, D.; Offringa, A. R.; Ord, S. M.; Paul, S.; Prabu, T.; Procopio, P.; Riding, J.; Roshi, A.; Shankar, N. Udaya; Sethi, Shiv K.; Srivani, K. S.; Subrahmanyan, R.; Tingay, S. J.; Waterson, M.; Wayth, R. B.; Webster, R. L.; Whitney, A. R.; Williams, A.; Wu, C.; Wyithe, J. S. B.; Corey, B. E.; Kratzenberg, E.; Lonsdale, C. J.; Rogers, A. E. E.; Dillon, Joshua Shane; de Oliveira Costa, Angelica; Ewall-Wice, Aaron Michael; Feng, Lu; Goeke, Robert F; Hewitt, Jacqueline N; Morgan, Edward H; Neben, Abraham Richard; Tegmark, Max Erik; Williams, Christopher Leigh; ... Show more Show less![Thumbnail](/bitstream/handle/1721.1/105094/Jacobs-2016-THE%20MURCHISON%20WIDEFI.pdf.jpg?sequence=4&isAllowed=y)
DownloadJacobs-2016-THE MURCHISON WIDEFI.pdf (7.721Mb)
PUBLISHER_POLICY
Publisher Policy
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Terms of use
Metadata
Show full item recordAbstract
We present the 21 cm power spectrum analysis approach of the Murchison Widefield Array Epoch of Reionization project. In this paper, we compare the outputs of multiple pipelines for the purpose of validating statistical limits cosmological hydrogen at redshifts between 6 and 12. Multiple independent data calibration and reduction pipelines are used to make power spectrum limits on a fiducial night of data. Comparing the outputs of imaging and power spectrum stages highlights differences in calibration, foreground subtraction, and power spectrum calculation. The power spectra found using these different methods span a space defined by the various tradeoffs between speed, accuracy, and systematic control. Lessons learned from comparing the pipelines range from the algorithmic to the prosaically mundane; all demonstrate the many pitfalls of neglecting reproducibility. We briefly discuss the way these different methods attempt to handle the question of evaluating a significant detection in the presence of foregrounds.
Date issued
2016-07Department
Haystack Observatory; Massachusetts Institute of Technology. Department of Physics; MIT Kavli Institute for Astrophysics and Space ResearchJournal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Jacobs, Daniel C., B. J. Hazelton, C. M. Trott, Joshua S. Dillon, B. Pindor, I. S. Sullivan, J. C. Pober, et al. “THE MURCHISON WIDEFIELD ARRAY 21 Cm POWER SPECTRUM ANALYSIS METHODOLOGY.” The Astrophysical Journal vol. 825, no. 2, 114, July 2016, pp. 1-16. © 2016. The American Astronomical Society.
Version: Final published version
ISSN
1538-4357
0004-637X