A review chapter consolidating optical polarimetry methods, instruments, and calibration practices, illustrated with the authors' DiPol-2 measurements of black hole binaries and early-type binaries.
A high-sensitivity polarimeter using a ferro-electric liquid crystal modulator
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abstract
We describe the HIgh Precision Polarimetric Instrument (HIPPI), a polarimeter built at UNSW 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 x 10$^{-6}$ on low polarization objects and a precision of better than 0.01% 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 $\pm$ 5 x 10$^{-6}$ in the g' band.
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Optical polarimetry: Methods, Instruments and Calibration Techniques
A review chapter consolidating optical polarimetry methods, instruments, and calibration practices, illustrated with the authors' DiPol-2 measurements of black hole binaries and early-type binaries.