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Quantifying ionospheric effects on time-domain astrophysics with the Murchison Widefield Array

Loi, Shyeh Tjing; Murphy, Tara; Bell, Martin E.; Kaplan, D L; Lenc, E; Offringa, Andre; Hurley-Walker, Natasha; Bernardi, G; Bowman, J D; Briggs, Franklin; Cappallo, Roger C; Corey, Brian E; Deshpande, Avinash; Emrich, David; Gaensler, B M; Goeke, R; Greenhill, Lincoln; Hazelton, B; Johnston-Hollitt, M; Kasper, J.C.; Kratzenberg, Eric; Lonsdale, Colin J; Lynch, Mervyn J; McWhirter, S.R.; Mitchell, D.A.; Morales, Miguel F; Morgan, Edward H; Oberoi, D; Ord, S M; Prabu, T; Rogers, Alan; Roshi, A.; Udaya Shankar, N.; Srivani, K. S.; Subrahmanyan, R.; Tingay, S.J.; Waterson, Mark; Wayth, Randall; Webster, Rachel L; Whitney, Alan; Williams, Andrew J.; Williams, Christopher L; Kasper, Justin


Refraction and diffraction of incoming radio waves by the ionosphere induce time variability in the angular positions, peak amplitudes and shapes of radio sources, potentially complicating the automated cross-matching and identification of transient and variable radio sources. In this work, we empirically assess the effects of the ionosphere on data taken by the Murchison Widefield Array (MWA) radio telescope. We directly examine 51 h of data observed over 10 nights under quiet geomagnetic...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stv1808
Access Rights: Open Access


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