Speckle Noise is the dominant source of error in high contrast imaging with adaptive optics system. We discuss the potential for wavefront sensing telemetry to calibrate speckle noise with sufficient precision and accuracy so that it can be removed in post-processing of science images acquired by high contrast imaging instruments. In such a self-calibrating system, exoplanet detection would be limited by photon noise and be significantly more robust and efficient than in current systems. We show initial laboratory and on-sky tests, demonstrating over short timescale that residual speckle noise is indeed calibrated to an accuracy exceeding readout and photon noise in the high contrast region. We discuss immplications for the design of space and ground high-contrast imaging systems.
@article{arxiv.2208.01806,
title = {High Contrast Imaging at the Photon Noise Limit with WFS-based PSF Calibration},
author = {Olivier Guyon and Barnaby Norris and Marc-Antoine Martinod and Kyohoon Ahn and Vincent Deo and Nour Skaf and Julien Lozi and Sebastien Vievard and Sebastiaan Haffert and Thayne Currie and Jared Males and Alison Wong and Peter Tuthill},
journal= {arXiv preprint arXiv:2208.01806},
year = {2022}
}
Comments
12 pages, 7 figures, To appear in SPIE Proceedings of Astronomical Telescopes + Instrumentation, 2022. arXiv admin note: text overlap with arXiv:2109.13958