A dual narrow-band wavelength scanning polarimeter

Details A dual narrow-band wavelength scanning polarimeter A dual narrow-band wavelength scanning polarimeter

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.172..545c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 172, Sept. 1975, p. 545-556.

Statistics

14

Digital Systems, Frequency Scanning, Line Shape, Optical Polarization, Polarimeters, Stellar Spectrophotometry, Electronic Control, Instrument Errors, Optical Scanners, Shot Noise, Spectral Line Width, Statistical Distributions

Scientific paper

A dual-channel polarimeter is described which is capable of making measurements across line profiles of stars to an accuracy limited by photon shot noise statistics. The system is digitally controlled and the photometry performed by pulse counting. Photometric scans can be made by tilting narrow-band interference filters in the orthogonally polarized beams and wavelength positions can be chosen to allow polarimetric measurements to be made at specific points on the line profile. Examples are given of line profile scans and of the statistics associated with polarimetric measurements.

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