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Assessment of Ionospheric Activity Tolerances for Epoch of Reionization Science with the Murchison Widefield Array

Trott, Cathryn; Jordan, C; Murray, S G; Pindor, B.; Mitchell, D.A.; Wayth, Randall; Line, J; McKinley, B; Beardsley, A. P.; Bowman, J D; Briggs, Franklin; Hazelton, B. J.; Hewitt, J.; Jacobs, D.; Morales, M. F.; Pober, J. C.; Sethi, S.; Shankar, U.; Subrahmanyan, R.; Tegmark, M.; Tingay, S. J.; Webster, R. L.; Wyithe, J. S. B.


Structure imprinted in foreground extragalactic point sources by ionospheric refraction has the potential to contaminate Epoch of Reionization (EoR) power spectra of the 21 cm emission line of neutral hydrogen. The alteration of the spatial and spectral structure of foreground measurements due to total electron content gradients in the ionosphere creates a departure from the expected sky signal. We present a general framework for understanding the signatures of ionospheric behavior in the 2D...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aae314
Access Rights: Open Access


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