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Corresponding Author
Name
Jeff Stoesz
Authors
NameAffiliation
Elena Masciadri INAF - Osservatorio di Arcetri
Franck Lascaux INAF - Osservatorio di Arcetri
Susanna Hagelin INAF - Osservatorio di Arcetri
Abstract
Session2 (Adaptive optics, interferometry, and other approaches to mitigate atmospheric optical turbulence.)
Title'The widest contiguous field of view at selected sites'
AbstractAstronomical imaging surveys of very wide, seeing-limited fields can achieve maximal efficiency if the entire field could be imaged at once. In the context of Ground-Layer Adaptive Optics (GLAO) the image quality can be gradually increased with decreased contiguous field of view in each pointing within the wider survey field. This improvement is from reduced anisoplanatism and is dependent on the vertical profile of the optical turbulence (Cn2 profiles). It is known that the vertical resolution of existing Cn2 measurement techniques is often under-sampled for wide field studies. Using measurements from Generalized-SCIDAR (GS), SODAR and MASS, we will present these uncertainties in the optimized trade-off between field of view and image quality for photometry of science targets at the resolution limit. We use a point spread function (PSF) model defined analytically in the spatial frequency domain to compute the relevant photometry figure of merit at visible and infrared wavelengths. Statistics of this PSF analysis on the database of Cn2 measurements are presented for different astronomical sites, including Mt. Graham, Arizona and Dome C, Antarctica. This research is part of the activities of ForOT (3D Forecasting of Optical Turbulence above astronomical sites).


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Updated on: Wed, Dec 17 2014 - 1849 UTC
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