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        A high-sensitivity polarimeter using a ferro-electric liquid crystal modulator

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        Final Accepted Version (PDF, 484Kb)
        Author
        Bailey, J.
        Kedziora-Chudczer, Lucyna
        Cotton, Daniel V.
        Bott, Kimberly
        Hough, J.H.
        Lucas, P.W.
        Attention
        2299/16753
        Abstract
        We describe the HIgh Precision Polarimetric Instrument (HIPPI), a polarimeter built at UNSW (The University of New South Wales) Australia and used on the Anglo-Australian Telescope (AAT). HIPPI is an aperture polarimeter using a ferro-electric liquid crystal modulator. HIPPI measures the linear polarization of starlight with a sensitivity in fractional polarization of ∼4 × 10−6 on low-polarization objects and a precision of better than 0.01 per cent on highly polarized stars. The detectors have a high dynamic range allowing observations of the brightest stars in the sky as well as much fainter objects. The telescope polarization of the AAT is found to be 48 ± 5 × 10−6 in the g′ band
        Publication date
        2015-05-21
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1093/mnras/stv519
        Other links
        http://hdl.handle.net/2299/16753
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