Design of a multi-object high-throughput low-resolution fiber spectrograph for WFMOS

Stephen A. Smee; Robert H. Barkhouser; Karl Glazebrook

doi:10.1117/12.672186

30 June 2006 Design of a multi-object high-throughput low-resolution fiber spectrograph for WFMOS

Stephen A. Smee, Robert H. Barkhouser, Karl Glazebrook

Proceedings Volume 6269, Ground-based and Airborne Instrumentation for Astronomy; 62692I (2006) https://doi.org/10.1117/12.672186
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

Stephen A. Smee, Robert H. Barkhouser, and Karl Glazebrook "Design of a multi-object high-throughput low-resolution fiber spectrograph for WFMOS", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62692I (30 June 2006); https://doi.org/10.1117/12.672186

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