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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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