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Proceedings Paper

Design of the CHIRON high-resolution spectrometer at CTIO
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Paper Abstract

Small telescopes coupled to high resolution spectrometers are powerful tools for Doppler planet searches. They allow for high cadence observations and flexible scheduling; yet there are few such facilities. We present an innovative and inexpensive design for CHIRON, a high resolution (R~80.000) Echelle spectrometer for the 1.5m telescope at CTIO. Performance and throughput are very good, over the whole spectral range from 410 to 870nm, with a peak efficiency of 15% in the iodine absorption region. The spectrograph will be fibre-fed, and use an iodine cell for wavelength calibration. An image slicer permits a moderate beam size. We use commercially available, high performance optical components, which is key for quick and efficient implementation. We discuss the optical design, opto-mechanical tolerances and resulting image quality.

Paper Details

Date Published: 20 July 2010
PDF: 7 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77354G (20 July 2010); doi: 10.1117/12.856709
Show Author Affiliations
Christian Schwab, Univ. of Heidelberg (Germany)
Julien F. P. Spronck, Yale Univ. (United States)
Andrei Tokovinin, Cerro Tololo Inter-American Observatory (Chile)
Debra A. Fischer, Yale Univ. (United States)

Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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