We describe Mini-HIPPI (Miniature HIgh Precision Polarimetric Instrument), a stellar polarimeter weighing just 650 grams but capable of measuring linear polarization to ∼10−5. Mini-HIPPI is based on the use of a Ferroelectric Liquid Crystal (FLC) modulator. It can easily be mounted on a small telescope and allows study of the polarization of bright stars at levels of precision which are hitherto largely unexplored. We present results obtained with Mini-HIPPI on a 35 cm telescope. Measurements of polarized standard stars are in good agreement with predicted values. Meaurements of a number of bright stars agree well with those from other high-sensitivity polarimeters. Observations of the binary system Spica show polarization variability around the orbital cycle.
@article{arxiv.1611.01596,
title = {A high precision polarimeter for small telescopes},
author = {Jeremy Bailey and Daniel V. Cotton and Lucyna Kedziora-Chudczer},
journal= {arXiv preprint arXiv:1611.01596},
year = {2016}
}