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Cambridge University Press (CUP), Publications of the Astronomical Society of Australia, (34), 2017

DOI: 10.1017/pasa.2017.36

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The Challenges of Low-Frequency Radio Polarimetry: Lessons from the Murchison Widefield Array

Journal article published in 2017 by E. Lenc ORCID, C. S. Anderson, N. Barry ORCID, J. D. Bowman, I. H. Cairns, J. S. Farnes, B. M. Gaensler ORCID, G. Heald ORCID, M. Johnston-Hollitt ORCID, D. L. Kaplan ORCID, C. R. Lynch ORCID, P. I. McCauley, D. A. Mitchell ORCID, J. Morgan, M. F. Morales and other authors.
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

AbstractWe present techniques developed to calibrate and correct Murchison Widefield Array low-frequency (72–300 MHz) radio observations for polarimetry. The extremely wide field-of-view, excellent instantaneous (u, v)-coverage and sensitivity to degree-scale structure that the Murchison Widefield Array provides enable instrumental calibration, removal of instrumental artefacts, and correction for ionospheric Faraday rotation through imaging techniques. With the demonstrated polarimetric capabilities of the Murchison Widefield Array, we discuss future directions for polarimetric science at low frequencies to answer outstanding questions relating to polarised source counts, source depolarisation, pulsar science, low-mass stars, exoplanets, the nature of the interstellar and intergalactic media, and the solar environment.

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