FIRST SEASON MWA EOR POWER SPECTRUM RESULTS at REDSHIFT 7

AP Beardsley; BJ Hazelton; IS Sullivan; P Carroll; N Barry; M Rahimi; B Pindor; CM Trott; J Line; DC Jacobs; MF Morales; JC Pober; G Bernardi; JD Bowman; MP Busch; F Briggs; RJ Cappallo; BE Corey; AD Oliveira-Costa; JS Dillon; D Emrich; A Ewall-Wice; L Feng; BM Gaensler; R Goeke; LJ Greenhill; JN Hewitt; N Hurley-Walker; M Johnston-Hollitt; DL Kaplan; JC Kasper; HS Kim; E Kratzenberg; E Lenc; A Loeb; CJ Lonsdale; MJ Lynch; B McKinley; SR McWhirter; DA Mitchell; E Morgan; AR Neben; N Thyagarajan; D Oberoi; AR Offringa; SM Ord; S Paul; T Prabu; P Procopio; J Riding; AEE Rogers; A Roshi; NU Shankar; SK Sethi; KS Srivani; R Subrahmanyan; M Tegmark; SJ Tingay; M Waterson; RB Wayth; RL Webster; AR Whitney; A Williams; CL Williams; C Wu; JSB Wyithe

Journal article

FIRST SEASON MWA EOR POWER SPECTRUM RESULTS at REDSHIFT 7

AP Beardsley, BJ Hazelton, IS Sullivan, P Carroll, N Barry, M Rahimi, B Pindor, CM Trott, J Line, DC Jacobs, MF Morales, JC Pober, G Bernardi, JD Bowman, MP Busch, F Briggs, RJ Cappallo, BE Corey, AD Oliveira-Costa, JS Dillon Show all

Astrophysical Journal | IOP Publishing Ltd | Published : 2016

DOI: 10.3847/1538-4357/833/1/102

Abstract

The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data andnow faces the challenge of overcoming foreground and systematic contamination to reduce the data to acosmological 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 changeto the analysis pipeline is tested against a two-dimensional power spectrum figure of merit to demonstrateimprovement. We incorporate the new techniques into a deep integration of 32 hours of MWA data. This data set isused to place a systematic-limited upper limit on ..

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University of Melbourne Researchers

Nichole Barry Author

Pietro Procopio Author

Rachel Webster Author

Stuart Wyithe Author

Grants

Awarded by Australian Government

Funding Acknowledgements

This work was supported by NSF grants AST-1410484 and AST-1206552. D.C.J. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1401708. This scientific work makes use of the Murchison Radio-astronomy Observatory, operated by CSIRO. We acknowledge the Wajarri Yamatji people as the traditional owners of the Observatory site. Support for the operation of the MWA is provided by the Australian Government (NCRIS), under a contract to Curtin University administered by Astronomy Australia Limited. We acknowledge the Pawsey Supercomputing Centre, which is supported by the Western Australian and Australian Governments.