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Paper: Single- and Dual-Aperture Interferometry at Southern Connecticut State University
Volume: 487, Resolving The Future Of Astronomy With Long-Baseline Interferometry
Page: 275
Authors: Horch, E. P.
Abstract: Two instruments for astronomical interferometry built at Southern Connecticut State University (SCSU) are discussed. The first is the Differential Speckle Survey Instrument (DSSI), which is a speckle camera built in 2008 and currently in operation at the WIYN 3.5-m Telescope at Kitt Peak. It is a two-channel speckle imaging system that utilizes electron-multiplying CCD cameras to capture speckle images in two colors simultaneously. The simultaneous information in two colors gives leverage on residual atmospheric dispersion that may be present in an observation. This allows reliable differential astrometry of binaries to be obtained on systems with separations smaller than one-quarter of the diffraction limit of the telescope, or under 10 mas at WIYN. A summary of the current observational projects being pursued with this system is given, including a survey of spectroscopic binaries from the Geneva-Copenhagen Catalogue. The second instrument, still being assembled and tested in the laboratory at SCSU, is a new two-station intensity interferometer that utilizes a Picoquant Picoharp timing module for real-time correlation of the photon signals received. The instrument and plans for observing with it are described.
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