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

    256522.pdf (2.560Mb)
    Access Status
    Open access
    Authors
    Lenc, E.
    Anderson, C.
    Barry, N.
    Bowman, J.
    Cairns, I.
    Farnes, J.
    Gaensler, B.
    Heald, G.
    Johnston-Hollitt, M.
    Kaplan, D.
    Lynch, C.
    McCauley, P.
    Mitchell, D.
    Morgan, John
    Morales, M.
    Murphy, T.
    Offringa, A.
    Ord, S.
    Pindor, B.
    Riseley, C.
    Sadler, E.
    Sobey, Charlotte
    Sokolowski, Marcin
    Sullivan, I.
    O Sullivan, S.
    Sun, X.
    Tremblay, S.
    Trott, Cathryn
    Wayth, Randall
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Lenc, E. and Anderson, C. and Barry, N. and Bowman, J. and Cairns, I. and Farnes, J. and Gaensler, B. et al. 2017. The Challenges of Low-Frequency Radio Polarimetry: Lessons from the Murchison Widefield Array. Publications of the Astronomical Society of Australia. 34: e040.
    Source Title
    Publications of the Astronomical Society of Australia
    DOI
    10.1017/pasa.2017.36
    ISSN
    1323-3580
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This paper has been accepted for publication and will appear in a revised form, subsequent to peer review and/or editorial input by Cambridge University Press, in Publications of the Astronomical Society of Australia published by Cambridge University Press. Copyright © 2017 Astronomical Society of Australia.

    URI
    http://hdl.handle.net/20.500.11937/57974
    Collection
    • Curtin Research Publications
    Abstract

    We 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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