Mr. Paul M. Klaucke Profile

Paul M. Klaucke

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Proceedings Article | 13 December 2020 Presentation + Paper

Toward an imaging capability with the Southern Connecticut Stellar Interferometer

Paul Klaucke, Richard Pellegrino, Samuel Weiss, Elliott Horch

Proceedings Volume 11446, 114461M (2020) https://doi.org/10.1117/12.2576346

KEYWORDS: Interferometers, Telescopes, Stars, Sensors, Photodetectors, Collimation, Avalanche photodiodes

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The Southern Connecticut Stellar Interferometer (SCSI) is an intensity interferometer that is designed to use correlated photon arrival times to determine the geometry of stars. Originally a low-cost, two-telescope instrument that used a 1-pixel single-photon avalanche diode (SPAD) detector at the focal plane of each telescope to record photon events, it is now being upgraded to include a third telescope. This will allow for the simultaneous detection of the photon correlation at three baselines, and thus the ability to map out the two-dimensional geometry of the source much more efficiently than with the two-telescope arrangement. Recent papers in the literature suggest that it may be possible to derive phase information in the Fourier domain from such triple correlations for the brightest stars, potentially giving SCSI an imaging capability. Prior to investigating this possibility, steps must be taken to maximize the observing efficiency of the SCSI. We present here our latest efforts in achieving better pointing, tracking, and collimation with our telescopes, and we discuss our first modeling results of the three-telescope situation in order to understand under what conditions the upgraded SCSI could retrieve imaging information.

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