Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26308
Title: | First Season MWA EoR Power spectrum Results at Redshift 7 | Authors: | Beardsley, A. P. Hazelton, B. J. Sullivan, I. S. Carroll, P. Barry, N. Rahimi, M. Pindor, B. Trott, C. M. Line, J. Jacobs, Daniel C. Morales, M. F. Pober, J. C. BERNARDI, GIANNI Bowman, Judd D. Busch, M. P. Briggs, F. Cappallo, R. J. Corey, B. E. de Oliveira-Costa, A. Dillon, Joshua S. Emrich, D. Ewall-Wice, A. Feng, L. Gaensler, B. M. Goeke, R. Greenhill, L. J. Hewitt, J. N. Hurley-Walker, N. Johnston-Hollitt, M. Kaplan, D. L. Kasper, J. C. Kim, H. S. Kratzenberg, E. Lenc, E. Loeb, A. Lonsdale, C. J. Lynch, M. J. McKinley, B. McWhirter, S. R. Mitchell, D. A. Morgan, E. Neben, A. R. Thyagarajan, Nithyanandan Oberoi, D. Offringa, A. R. Ord, S. M. Paul, S. Prabu, T. Procopio, P. Riding, J. Rogers, A. E. E. Roshi, A. Udaya Shankar, N. Sethi, Shiv K. Srivani, K. S. Subrahmanyan, R. Tegmark, M. Tingay, S. J. Waterson, M. Wayth, R. B. Webster, R. L. Whitney, A. R. Williams, A. Williams, C. L. Wu, C. Wyithe, J. S. B. |
Issue Date: | 2016 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 833 | Issue: | 1 | First Page: | 102 | Abstract: | 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 {{{∆ }}}<SUP>2</SUP>≤slant 2.7× {10}<SUP>4</SUP> mK<SUP>2</SUP> at k = 0.27 h Mpc<SUP>-1</SUP> 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. | URI: | http://hdl.handle.net/20.500.12386/26308 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/833/1/102 | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/833/1/102 | Bibcode ADS: | 2016ApJ...833..102B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Beardsley2016.pdf | Pdf editoriale | 4.61 MB | Adobe PDF | View/Open |
Page view(s)
51
checked on Apr 25, 2024
Download(s)
18
checked on Apr 25, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.