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Measuring the global 21-cm signal with the MWA-I: Improved measurements of the Galactic synchrotron background using lunar occultation

McKinley, B; Bernardi, Gianni; Trott, C. M.; Line, J L B; Wayth, Randall; Offringa, A.; Pindor, B.; Jordan, C H; Sokolowski, M; Tingay, S. J.; Lenc, E; Hurley-Walker, Natasha; Bowman, J D; Briggs, Franklin; Webster, Rachel L

Description

We present early results from a project to measure the sky-averaged (global), redshifted 21cm signal from the Epoch of Reionization (EoR), using the Murchison Widefield Array (MWA) telescope. Because interferometers are not sensitive to a spatially invariant global average, they cannot be used to detect this signal using standard techniques. However, lunar occultation of the radio sky imprints a spatial structure on the global signal, allowing us to measure the average brightness temperature of...[Show more]

CollectionsANU Research Publications
Date published: 2018-09-06
Type: Journal article
URI: http://hdl.handle.net/1885/202536
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/MNRAS/STY2437
Access Rights: https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model

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