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arXiv · 2607.29524

Towards Autodifferentiable Point Spread Function Modelling for the VLT/ERIS Vortex Coronagraph

P. Van de Walle Suarez·G. Orban De Xivry·O. Absil·M. J. Bonse·R. J. De Rosa·V. Christiaens
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Abstract

High-contrast imaging of exoplanets is limited by the presence of quasi-static speckles and existing post-processing methods remain above the theoretical noise limit. We investigate a novel framework that incorporates adaptive optics (AO) wavefront sensor telemetry into post-processing using a differentiable optical model of the ERIS vortex coronagraph. As a first proof of concept, we inject AO telemetry into an ERIS forward model and assess its ability to reproduce the on-sky point spread function (PSF). We find that jitter discrepancies between the science camera and the AO telemetry hinder accurate PSF reconstruction. We proposed a plan to characterise this jitter and find its mechanical origin.

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P. Van de Walle Suarez, G. Orban De Xivry, O. Absil, M. J. Bonse, R. J. De Rosa, V. Christiaens. 2026-07-31. Towards Autodifferentiable Point Spread Function Modelling for the VLT/ERIS Vortex Coronagraph. https://arxiv.org/abs/2607.29524

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