Characterizing water vapour seeing for METIS HCI

Prashant Pathak; Olivier Absil; Ben Courtney-Barrer; Christian Delacroix; Gilles Orban de Xivry; Julien Woillez; Alexis Matter; Philippe Bério; Roy van Boekel

doi:10.1117/12.3019987

28 August 2024 Characterizing water vapour seeing for METIS HCI

Prashant Pathak, Olivier Absil, Ben Courtney-Barrer, Christian Delacroix, Gilles Orban de Xivry, Julien Woillez, Alexis Matter, Philippe Bério, Roy van Boekel

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130974C (2024) https://doi.org/10.1117/12.3019987
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

This study explores the impact of rapid fluctuations in local water vapor content on ground-based wavefront quality in the infrared spectrum. Using data from the Very Large Telescope Interferometer, we study water vapor fluctuations in the K-band, revealing that water vapor seeing significantly affects wavefront quality, especially in the N band (8–13μm). The study proposes focal-plane wavefront sensing techniques to mitigate these effects, and through simulations, quantifies potential improvements in high-contrast imaging performance.

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Prashant Pathak, Olivier Absil, Ben Courtney-Barrer, Christian Delacroix, Gilles Orban de Xivry, Julien Woillez, Alexis Matter, Philippe Bério, and Roy van Boekel "Characterizing water vapour seeing for METIS HCI", Proc. SPIE 13097, Adaptive Optics Systems IX, 130974C (28 August 2024); https://doi.org/10.1117/12.3019987

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