@inproceedings{e4173d8bfaae4efa911ef2e492165af4,
title = "Developing an Instrumental Polarization Characterization Routine for SCExAO VAMPIRES",
abstract = "The Visible Aperture Masking Polarimetric Imager for Resolved Exoplanetary Structures (VAMPIRES) is a visible light instrument on the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system.In a previous work, the instrumental polarization (IP) and crosstalk of VAMPIRES was characterized from measurements with a polarized internal calibration source.In this work, we use unpolarized standard star observations to estimate the polarization of Subaru's Nasmyth mirror (M3) and use polarized standard star observations to quantify the overall system Mueller matrix model's accuracy.We present an instrument matrix inversion routine that has returned stable results for all tested on-sky sources.With the current 675nm Mueller matrix model of VAMPIRES, the median residuals when retrieving the on-sky degree of linear polarization (DoLP) and angle of linear polarization (AoLP) of three polarized standards were 0.27% and 3.57% respectively.",
keywords = "calibration, exoplanet polarimetry, high-contrast imaging, instrument matrix, Mueller matrix model, polarimetric accuracy, polarimetric imaging, SCExAO-VAMPIRES",
author = "Manxuan Zhang and Maxwell Millar-Blanchaer and Boris Safonov and Miles Lucas and Lucinda Lilley and Jaren Ashcraft and Barnaby Norris and Julien Lozi and Olivier Guyon and Michael Bottom and Peter Tuthill",
note = "Publisher Copyright: {\textcopyright} 2024 SPIE.; Ground-Based and Airborne Instrumentation for Astronomy X 2024 ; Conference date: 16-06-2024 Through 21-06-2024",
year = "2024",
doi = "10.1117/12.3019283",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Bryant, {Julia J.} and Kentaro Motohara and Vernet, {Joel R.}",
booktitle = "Ground-Based and Airborne Instrumentation for Astronomy X",
}