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Proceedings Paper

Design of a multi-object high-throughput low-resolution fiber spectrograph for WFMOS
Author(s): Stephen A. Smee; Robert H. Barkhouser; Karl Glazebrook
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Paper Abstract

We present the preliminary optical and optomechanical design of a high throughput, fiber spectrograph for the Gemini/Subaru Wide-Field, Fiber-Fed, Multi-Object Spectrograph (WFMOS) designed with the principle goal of studying the nature of dark energy via enormous high-redshift spectroscopic surveys. Developed from an original Sloan Digital Sky Survey design this multi-object spectrograph utilizes all-refractive cameras, volume phase holographic gratings, and state-of-the-art CCD detectors to produce a peak instrument throughput of ~ 70%. The instrument produces 292 spectra simultaneously in two channels covering the bandpass 390 < λ < 1000 nm with a mean spectral resolution, λ/FWHM, of R ~ 1700. WFMOS will employ approximately ten of these fiber spectrographs on an 8 m class telescope to capture nearly 3000 spectra simultaneously. When used in a nod & shuffle mode of operation these spectrographs will facilitate spectroscopy of faint 0.5 < z < 3.5 galaxies with unprecedented efficiency.

Paper Details

Date Published: 30 June 2006
PDF: 18 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62692I (30 June 2006); doi: 10.1117/12.672186
Show Author Affiliations
Stephen A. Smee, Johns Hopkins Univ. (United States)
Robert H. Barkhouser, Johns Hopkins Univ. (United States)
Karl Glazebrook, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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