Affiliation
Steward Observatory, University of ArizonaIssue Date
2023-05-29
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Boris Safonov, Maxwell A. Millar-Blanchaer, Manxuan Zhang, Barnaby R. Norris, Olivier Guyon, Julien Lozi, and Steph Sallum "Differential speckle polarimetry with SCExAO VAMPIRES," Journal of Astronomical Telescopes, Instruments, and Systems 9(2), 028005 (29 May 2023). https://doi.org/10.1117/1.JATIS.9.2.028005Rights
© 2023 Society of Photo-Optical Instrumentation Engineers (SPIE).Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
The differential polarization visibilities RQ and RU of an object are the ratios of its visibilities corresponding to orthogonal polarizations, the interferometric analogs to Stokes Q and U intensity images. The measurement of differential polarization visibilitites can be used for constraining inner parts of circumstellar envelopes of young or evolved stars at the diffraction limited resolution of the feeding telescope. We demonstrate the estimation of both amplitude and phase of RQ and RU from data obtained using SCExAO VAMPIRES through the full pupil of the 8-m Subaru telescope using the differential speckle polarimetry technique. The correction for biases arising due to instrumental polarization effects is discussed. The accuracy of RQ and RU measurement with VAMPIRES is limited by imperfect knowledge of instrumental polarization and amounts to 5 × 10 - 3. © 2023 Society of Photo-Optical Instrumentation Engineers (SPIE).Note
Immediate accessISSN
2329-4124Version
Final Published Versionae974a485f413a2113503eed53cd6c53
10.1117/1.JATIS.9.2.028005