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Proceedings Paper

Pupil Scrambling Integral Field Unit (PSI) for the Robert Stobie Spectrograph on SALT
Author(s): Michael P. Smith; Marsha J. Wolf; Matthew A. Bershady; Guangwei Fu; Longji Bing
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Paper Abstract

We propose to build an integral field unit (IFU) for the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT). This IFU (PSI) will employ the scrambling properties of fibers to address fundamental problems in achieving photon-limited sky subtraction due to variations in pupil illumination during observations. PSI will be fully encapsulated with a compact folding scheme in a standard long slit mask—far thinner than any previous fiber-based implementation. The IFU will cover 14 x 24 arcsec on sky, achieving spectral resolution R ≡ λ/δλ up to 6200 and photon-limited sky subtraction for studies of faint extended gas around galaxies beyond the reach of current 4m-class instruments. It will incorporate new-technology octagonal shaped fiber cores coupled by telecentric, pupil-imaging lenslets to fully optimize pupil scrambling and provide 100% integral sky coverage.

Paper Details

Date Published: 22 July 2016
PDF: 10 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99125B (22 July 2016); doi: 10.1117/12.2233102
Show Author Affiliations
Michael P. Smith, Univ. of Wisconsin-Madison (United States)
Marsha J. Wolf, Univ. of Wisconsin-Madison (United States)
Matthew A. Bershady, Univ. of Wisconsin-Madison (United States)
Guangwei Fu, Univ. of Wisconsin-Madison (United States)
Longji Bing, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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