Physics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982msngr..30...23b&link_type=abstract
ESO Messenger, Dec. 1982, p. 23-26. Research supported by the Deutsche Forschungsgemeinschaft.
Physics
3
Amphitrite Asteroid, Asteroids, Charon, Digital Techniques, Interferometry, Pluto (Planet), Speckle Patterns, High Resolution, Image Processing, Image Reconstruction, Quasars, Seyfert Galaxies
Scientific paper
Digital speckle interferometric observations of the 9th and 11th magnitude asteroids Juno and Amphitrite and of the 16th magnitude moon of Pluto, Charon, are reported. Results are also reported for the 11th magnitude Seyfert galaxy NGC 1068, the 12.7th magnitude quasar 3 C 273, and the 16.2 magnitude triple QSO PG 1115+080. The observational technique consists of Fourier analyses of large numbers of short-exposure photographs, i.e., speckle interferograms, to produce high resolution autocorrelated imagery. Short exposures are used to retain high resolution features. Image intensifiers with a gain of 300,000 were part of the equipment, together with a photon-counting mode capability. A total of 1450 speckle interferograms were produced for Juno, 1776 for Amphitrite, and 15,000 for Charon. A method for image reconstruction involving speckle masking is described, together with high resolution speckle spectroscopy.
Baier Gerold
Hetterich N.
Weigelt Gerd
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