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Design of the high resolution optical spectrograph (HROS) for the Gemini telescope

D'Arrigo, P; Bingham, RG; Charalambous, A; Crawford, I; Diego, F; Percival, JF; Savidge, TE; (2000) Design of the high resolution optical spectrograph (HROS) for the Gemini telescope. In: Lye, M and Moorwood, AFM, (eds.) OPTICAL AND IR TELESCOPE INSTRUMENTATION AND DETECTORS, PTS 1 AND 2. (pp. 159 - 166). SPIE-INT SOC OPTICAL ENGINEERING

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Abstract

HROS will be the key instrument for high resolution spectroscopy for UV to near-IR wavelengths at the Gemini South telescope. The instrument is unique in providing a resolving power of R=50,000 at the Cassegrain focus of an I-metre telescope. Taking advantage of this location, the spectrograph is optimized for high throughput, particularly for the UV region, and high efficiency (by covering a wide wavelength range in a single exposure).Here we present the final opto-mechanical design of the spectrograph, together with its predicted performance. In particular, we show how our design delivers an overall peak throughput of almost 30% and coverage of wavelengths between 325 and 885 nm in a single CCD exposure. We also discuss the development of the design fi-om the science requirements and some of the mechanical issues that drove it to this solution. Finally we report on the current status of optics procurement and testing.

Type:Proceedings paper
Title:Design of the high resolution optical spectrograph (HROS) for the Gemini telescope
Event:Conference on Optical and IR Telescope Instrumentation and Detectors
Location:MUNICH, GERMANY
Dates:2000-03-27 - 2000-03-31
ISBN:0-8194-3633-X
Keywords:spectrograph, high resolution, Cassegrain, echelle, optical design
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy

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