A New Solution for the Dispersive Element in Astronomical Spectrographs

We present a new solution for the dispersive element in astronomical spectrographs that, in many cases, can provide an upgrade path to enhance the spectral resolution of existing moderate-resolution reflection-grating spectrographs. We demonstrate that in the case of LRIS-R at the Keck 1 Telescope,...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 2010-02, Vol.122 (888), p.201-206
Main Authors: Epps, Harland W., Cohen, Judith G., Clemens, J. Christopher
Format: Article
Language:English
Subjects:
Astronomy
Cameras
Collimation
Earth, ocean, space
Exact sciences and technology
Infrared reflection
Light beams
Multiplexing
Optical reflection
Spectral resolution
Telescopes
Wave reflection
Wavelengths
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Summary:We present a new solution for the dispersive element in astronomical spectrographs that, in many cases, can provide an upgrade path to enhance the spectral resolution of existing moderate-resolution reflection-grating spectrographs. We demonstrate that in the case of LRIS-R at the Keck 1 Telescope, a spectral resolution of 18,000 can be achieved with reasonable throughput under good seeing conditions.
ISSN:0004-6280
1538-3873
DOI:10.1086/650547