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Size of the halo of the adaptive optics PSF

: Gladysz, Szymon; Louarn, M. le; Yaitskova, N.; Garcia-Rissmann, A.; Kann, L.; Drummond, J.; Johnson, R.; Roskey, D.


Ellerbroek, Brent L. ; American Astronomical Society -AAS-; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Adaptive optics systems III. Pt.2 : 1 - 6 July 2012, Amsterdam, Netherlands; part of SPIE astronomical instrumentation
Bellingham, WA: SPIE, 2012 (Proceedings of SPIE 8447)
ISBN: 978-0-8194-9148-0
Paper 844725
Conference "Adaptive Optics Systems" <3, 2012, Amsterdam>
Conference Paper
Fraunhofer IOSB ()
adaptive optic; speckle; statistical optics

It is a widely accepted conjecture that the width of the incoherent halo in an adaptive optics point-spread function (PSF) should decrease with the level of correction. Using end-to-end simulations we prove that this is not the case and the halo is actually increasing in width, albeit at a decreasing overall brightness level as must be the case with increasing correction. The simulations span the cases of: seeing-limited, partial-, and high-order adaptive-optics (AO) correction. We show the relationship between the theory of partially-developed speckle and the observed statistical behavior of on-axis PSF intensity. Finally, we check the results of the simulations with real data obtained using the 3.5m Starfire Optical Range telescope located in New Mexico, US.