Polarization analysis of the VLTI and GRAVITY

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Abstract

The goal of this work is to characterize the polarization effects of the VLTI and GRAVITY. This is needed to calibrate polarimetric observations with GRAVITY for instrumental effects and to understand the systematic error introduced to the astrometry due to birefringence when observing targets with a significant intrinsic polarization. By combining a model of the VLTI light path and its mirrors and dedicated experimental data, we construct a full polarization model of the VLTI UTs and the GRAVITY instrument.

Year of Publication
2023
Date Published
2024-01
Journal Title
Astronomy & Astrophysics
Volume
681
Start Page or Article ID (correct)
A115
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