Statistics – Computation
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..963n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, June 1, 1989, p. 963-1028. Research supported by t
Statistics
Computation
47
Computational Astrophysics, Image Analysis, Image Processing, Light Scattering, Fourier Transformation, Scintillation Counters, Spectral Line Width, Telescopes, Very Long Base Interferometry
Scientific paper
The appearance of the scatter-broadened image of a point source in the presence of strong scattering is explored. A physical model of the scattering optics is used to analyze the results of numerical simulations performed with a one-dimensional scattering screen. It is demonstrated that the shape of the image depends critically on the relative magnitude of the integration time with respect to the slow-refractive and fast-refractive time scales. In the second part, a thin-screen scalar diffraction theory is used to estimate the rms image visibilities measured by a two-element interferometer. It is found that the measured visibilities depend both on the integration time of the observations and on the bandwidth employed.
Goodman Jeremy
Narayan Ramesh
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