Physics – Optics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..627..282r&link_type=abstract
IN: Instrumentation in astronomy VI; Proceedings of the Meeting, Tucson, AZ, Mar. 4-8, 1986. Part 1 (A87-36376 15-35). Bellingha
Physics
Optics
25
Charge Coupled Devices, Echelle Gratings, Fiber Optics, Spectroscopic Telescopes, High Resolution, Infrared Spectra, Spectral Resolution, Visible Spectrum
Scientific paper
A versatile echelle spectrograph capable of moderate to high resolution precision spectroscopy has been developed. This highly stable instrument is in a temperature- and humidity-controlled room, and is coupled to a 1.6-m telescope via an optical fiber. Moderate resolution 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 CCD. A simple grating tilt can switch the beam to a cross-dispersing grating and long focus cameras allowing resolutions up to 80,000. The high resolution beam has a more typical geometry with anamorphic magnification greater than one. 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 SNR monitoring programs.
Huenemoerder David P.
Ramsey Lawrence W.
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