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Murchison Widefield Array Observations of Anomalous Variability: A Serendipitous Night-Time Detection of Interplanetary Scintillation

Kaplan, D L; Tingay, Steven; Manoharan, P.K.; Macquart, J. P; Hancock, P.J.; Morgan, John; Mitchell, D.A.; Ekers, Ronald D; Wayth, Randall; Trott, Cathryn; Murphy, Tara; Oberoi, D; Cairns, Iver Hugh; Feng, Lu; Bernardi, G; Briggs, Franklin; Deshpande, Avinash; Greenhill, Lincoln; Prabu, T; Srivani, K. S.


We present observations of high-amplitude rapid (2 s) variability toward two bright, compact extragalactic radio sources out of several hundred of the brightest radio sources in one of the 30° × 30° Murchison Widefield Array (MWA) Epoch of Reionization fields using the MWA at 155 MHz. After rejecting intrinsic, instrumental, and ionospheric origins we consider the most likely explanation for this variability to be interplanetary scintillation (IPS), likely the result of a large coronal mass...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Astrophysical Journal Letters
DOI: 10.1088/2041-8205/809/1/L12
Access Rights: Open Access


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