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Paper: Interferometric Imaging Tests for the Large Binocular Telescope
Volume: 194, Working on the Fringe: Optical and IR Interferometry from Ground and Space
Page: 312
Authors: Correia, S.; Richichi, A.
Abstract: We present an experiment of interferometric imaging for the Large Binocular Telescope (LBT), conducted at the 1.5m TIRGO infrared telescope. The raw data were produced by simulating the LBT pupil with a mask on the secondary mirror. Different conditions of D/r0, where D is the single aperture diameter and r0 the Fried parameter, were simulated by the choice of D, as well as earth rotation by rotation of the secondary mirror. The data set collected consists of several sequences of short exposure interferograms of both point-like and binary stars, for two different D/r0 conditions. Capability of a Lucy-Richardson deconvolution algorithm based on to reconstruct an object estimate from a set of LBT-like interferometric real data is demonstrated by the reconstruction of the binary star γ Leo. Retrieved binary parameter values are compared to catalog values, and a good astrometric agreement is found. Photometric and resolution limitations are also discussed, and we show first applications of this reconstruction method to computer simulations of LBT data.
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