SUSI: an update on instrumental developments and science

John Davis; Michael J. Ireland; Andrew P. Jacob; Julian R. North; Stephen M. Owens; J. Gordon Robertson; William J. Tango; Peter G. Tuthill

doi:10.1117/12.668982

23 June 2006 SUSI: an update on instrumental developments and science

John Davis, Michael J. Ireland, Andrew P. Jacob, Julian R. North, Stephen M. Owens, J. Gordon Robertson, William J. Tango, Peter G. Tuthill

Author Affiliations +

Proceedings Volume 6268, Advances in Stellar Interferometry; 626804 (2006) https://doi.org/10.1117/12.668982
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

The Sydney University Stellar Interferometer is a long baseline optical interferometer located in northern New South Wales, Australia. It has a North-South array of eleven fixed input siderostat stations giving a range of baselines from 5 to 640 m. Currently ten baselines from 5 to 160 m are fully operational and beam-combination and detection systems for the spectral ranges 430-520nm and 550-950nm are available. Dichroic beam-splitters have been introduced to allow simultaneous observations with both spectral systems. The original blue beam-combination system has been upgraded to improve sensitivity and to allow rapid wavelength switching. A software scheduler has been developed to automate much of the observational procedure including the acquisition of a star, fringe search and acquisition, recording of fringe scans, and the taking of photometric scans. A data pipeline for processing the observational data has been further developed to include seeing corrections and this has improved the calibration of the observational data. Preliminary results of scientific observations with both blue and red systems, including observations of single stars, binary stars and Cepheid variables are described.

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John Davis, Michael J. Ireland, Andrew P. Jacob, Julian R. North, Stephen M. Owens, J. Gordon Robertson, William J. Tango, and Peter G. Tuthill "SUSI: an update on instrumental developments and science", Proc. SPIE 6268, Advances in Stellar Interferometry, 626804 (23 June 2006); https://doi.org/10.1117/12.668982

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