The dark energy spectrometer - A potential multi-fiber instrument for the Blanco 4-meter telescope

J. L. Marshall*, Stephen M. Kent, H. Thomas Diehl, Brenna Flaugher, Joshua Frieman, Richard G. Kron, D. L. DePoy, Matthew Colless, Will Saunders, Greg A. Smith, Ofer Lahav, Filipe Abdalla, David Brooks, Peter Doel, Donnacha Kirk, James Annis, Huan Lin, John P. Marriner, Stephanie Jouvel, Michael D. Seiffert

*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

We describe the preliminary design of the Dark Energy Spectrometer (DESpec), a fiber-fed spectroscopic instrument concept for the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory (CTIO). DESpec would take advantage of the infrastructure recently deployed for the Dark Energy Camera (DECam). DESpec would be mounted in the new DECam prime focus cage, would be interchangeable with DECam, would share the DECam optical corrector, and would feature a focal plane with ∼4000 robotically positioned optical fibers feeding multiple high-throughput spectrometers. The instrument would have a field of view of 3.8 square degrees, a wavelength range of approximately 500<λ<1000 nm, and a spectral resolution of R∼3000. DESpec would provide a powerful spectroscopic follow-up system for sources in the Southern hemisphere discovered by the Dark Energy Survey and LSST.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy IV
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: 1 Jul 20126 Jul 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8446
ISSN (Print)0277-786X

Conference

ConferenceGround-Based and Airborne Instrumentation for Astronomy IV
Country/TerritoryNetherlands
CityAmsterdam
Period1/07/126/07/12

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