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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)


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 640m. Currently ten baselines from 5 to 160 m are fully operational and beam-combination and detection systems for the spectral ranges 430-520 nm and 550-950 nm 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.

Original languageEnglish
Title of host publicationAdvances in stellar interferometry
EditorsJohn Monnier, Markus Schöller, William Danchi
Place of PublicationBellingham, WA
Number of pages9
Volume6268 I
ISBN (Print)0819463337, 9780819463333
Publication statusPublished - 2006
Externally publishedYes
EventAdvances in Stellar Interferometry - Orlando, FL, United States
Duration: 25 May 200630 May 2006


OtherAdvances in Stellar Interferometry
CountryUnited States
CityOrlando, FL


  • Binary stars
  • Optical interferometry
  • Pulsating stars
  • Stars
  • SUSI


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