A Versatile Fiber Coupled CCD/Echelle Spectrograph System

Lawrence W. Ramsey; David P. Huenemoerder

doi:10.1117/12.968102

13 October 1986 A Versatile Fiber Coupled CCD/Echelle Spectrograph System

Lawrence W. Ramsey, David P. Huenemoerder

Proceedings Volume 0627, Instrumentation in Astronomy VI; (1986) https://doi.org/10.1117/12.968102
Event: 1986 Astronomy Conferences, 1986, Tucson, United States

Abstract

We have developed a versatile echelle spectrograph capable of moderate to high resolution precision spectroscopy. This highly stable instrument is in a temperature and humidity controlled room and is coupled to our 1.6 meter telescope via an optical fiber. Moderate resolution (λ/Δλ = 10000) spectra with near total spectral coverage from 400-900 nm are done at a Quasi-Littrow focus with no anamorphic magnification. A 200 mm f/2 camera focuses thirty-four orders of prism cross dispersed spectra onto a RCA SID501 CCD. A simple grating tilt can switch the beam to a cross-dispersing grating and long focus cameras allowing resolutions up to 80000. The high resolution beam has a more typical geometry with anamorphic magnification greater than one. Either small fibers or an image slicer can be used to obtain the highest resolution spectra. Observations conducted since Winter 1985 have shown the system to have excellent photometric and radial velocity characteristics; it is especially suited to long term, high signal-to-noise monitoring programs.

Citation Download Citation

Lawrence W. Ramsey and David P. Huenemoerder "A Versatile Fiber Coupled CCD/Echelle Spectrograph System", Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986); https://doi.org/10.1117/12.968102

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