A New Solution for the Dispersive Element in Astronomical Spectrographs

Details A New Solution for the Dispersive Element in Astronomical Spectrographs A New Solution for the Dispersive Element in Astronomical Spectrographs

2009-08-05

arxiv.org/abs/0908.0765v3

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Final version as published by the PASP

Scientific paper

We present a new solution for the dispersive element in astronomical spectrographs, which 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.

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