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Proceedings Paper

H.O.R.S. a new visiting instrument for G.T.C. based on the Utrecht Echelle Spectrograph
Author(s): José Peñate; Felix Gracia; Carlos Allende; Juan Calvo; Samuel Santana
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Paper Abstract

The High Optical Resolution Spectrograph (HORS) is a proposed high-resolution spectrograph for the 10-m Gran Telescopio Canarias (GTC) based on components from UES, a spectrograph which was in use at the 4.2-m William Herschel Telescope (WHT) between 1992 and 2001. HORS is designed as a cross-dispersed echelle spectrograph to observe in the range 380-800 nm with a FWHM resolving power of about 50,000. HORS would operate on the GTC as a general-purpose high-resolution spectrograph, and it would serve as a test-bed for some of the technologies proposed for ESPRESSO – an ultra-high stability spectrograph planned for the Very Large Telescope (VLT) of the European Southern Observatory. The HORS spectrograph will be placed in the Coudé room, where it can enjoy excellent thermal and mechanical stability, fiber fed from the Nasmyth focus, which is shared with OSIRIS. Inside the spectrograph, incoming light will hit a small folder mirror before reaching the collimator. After a second folder, the light will go through a set of three prisms and an Echelle grating before entering the spectrograph camera and, finally, reaching the detector. This manuscript contains a summary of the whole process that has transformed UES into HORS, with all the mechanical and optical modifications that have been introduced to reach the final layout.

Paper Details

Date Published: 28 July 2014
PDF: 8 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91478J (28 July 2014); doi: 10.1117/12.2057600
Show Author Affiliations
José Peñate, Instituto de Astrofísica de Canarias (Spain)
Felix Gracia, Instituto de Astrofísica de Canarias (Spain)
Carlos Allende, Instituto de Astrofísica de Canarias (Spain)
Juan Calvo, Instituto de Astrofísica de Canarias (Spain)
Samuel Santana, Instituto de Astrofísica de Canarias (Spain)

Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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