Journal ArticleDOI
Statistics of stellar speckle patterns
R. J. Scaddan,J. G. Walker +1 more
TLDR
Photon-counting techniques have been applied to a study of the intensity fluctuations in the image of an unresolved star at the Cassegrain focus of the 91-cm telescope of the Royal Greenwich Observatory.Abstract:
Photon-counting techniques have been applied to a study of the intensity fluctuations in the image of an unresolved star at the Cassegrain focus of the 91-cm telescope of the Royal Greenwich Observatory. Time-averaged temporal autocorrelation functions and moments of intensity have been computed. The results are discussed in terms of atmospheric turbulence and in relation to stellar speckle interferometry.read more
Citations
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Book ChapterDOI
V The Effects of Atmospheric Turbulence in Optical Astronomy
TL;DR: In this article, the authors discuss the effects of atmospheric turbulence in optical astronomy, summarizes the present state of the theory, reviews the experimental checks that have been made, and discusses the implications in the domain of astronomical observations.
Journal ArticleDOI
Atmospheric Intensity Scintillation of Stars. III. Effects for Different Telescope Apertures
TL;DR: In this article, a sequence of power spectra measured for smaller apertures is extrapolated up to very large (8 m) telescopes, with a gradual transmission falloff near the edges.
Journal ArticleDOI
On the origin of speckle boiling and its effects in stellar speckle interferometry.
F Roddier,J M Gilli,G Lund +2 more
TL;DR: In this paper, an expression for the life-time of stellar speckle as a function of the distribution of wind and turbulence in the Earth's atmosphere is given, in agreement with previously published observations and with the results of a laboratory simulation.
Journal ArticleDOI
Speckle Statistics in Adaptively Corrected Images
TL;DR: In this article, a fast readout mode was developed to take short exposures of stellar images corrected by adaptive optics at ground-based UCO/Lick Observatory, with integration times of 5 ms and a time between successive frames of 14.5 ms (λ = 2.2 μm).
References
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Journal Article
Attainment of Diffraction Limited Resolution in Large Telescopes by Fourier Analysing Speckle Patterns in Star Images
Journal ArticleDOI
Non-Gaussian fluctuations in electromagnetic radiation scattered by random phase screen. I. Theory
E Jakeman,P N Pusey +1 more
TL;DR: In this article, the statistical, spatial and temporal coherence properties of electromagnetic radiation scattered into the far field by a deep random phase screen are investigated, and it is shown that significant departures from Gaussian behaviour can occur even when the phase correlation length is much smaller than the dimensions of the scattering region.
Journal ArticleDOI
Comparison of vertical profile turbulence structure with stellar observations.
TL;DR: Comparison of the observed turbulence structure with meteorological data and simultaneously acquired stellar scintillation data has been successful and integralrals over the observed Turbulence and wind velocity data were computed as required by theory.
Journal ArticleDOI
Correction of atmospheric distortion with an image-sharpening telescope*
TL;DR: In this paper, a 30 x 5 cm aperture telescope employing six movable mirrors to compensate for atmosphere-induced phase distortion is built and tested, and a feedback system adjusts the mirrors in real time to maximize the intensity of light passing through a narrow slit in the image plane.
Journal ArticleDOI
Photon correlation study of stellar scintillation
TL;DR: In this paper, the statistical and temporal correlation properties of stellar scintillation were investigated using the fast response time and high sensitivity of equipment now standard for laser light-scattering applications.