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Proceedings Paper

PSF calibration using the Lyot-based low order wavefront sensor telemetry: first simulations
Author(s): Garima Singh; Julien Lozi; Elodie Choquet; Eugene Serabyn; Olivier Guyon
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Paper Abstract

One of the factors that drives the performance of small inner working angle (IWA) coronagraphs is the quality of the low-order wavefront calibration and control. The uncorrected residuals scatter the starlight and produce intensity fluctuations, which as a result creates dynamic speckle noise in the focal plane. To improve post processing of the science images, the low-order telemetry of the residuals left uncorrected by the control loop can be used to calibrate the amount of starlight leakage at small angular separations. In this proceeding, we present the preliminary simulations of point spread function calibration using the Lyot-based low-order wavefront sensor measurements (tip-tilt errors only) for a vector vortex coronagraph.

Paper Details

Date Published: 4 August 2016
PDF: 10 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99097K (4 August 2016); doi: 10.1117/12.2231244
Show Author Affiliations
Garima Singh, Jet Propulsion Lab. (United States)
Julien Lozi, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Elodie Choquet, Jet Propulsion Lab. (United States)
Eugene Serabyn, Jet Propulsion Lab. (United States)
Olivier Guyon, Subaru Telescope, National Astronomical Observatory of Japan (United States)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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