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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. Proceedings of SPIE - The International Society for Optical Engineering , 4008

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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 8-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 from 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:Article
Title:Design of the high resolution optical spectrograph (HROS) for the Gemini telescope
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy

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