Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasp..115..235f&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 115, Issue 804, pp. 235-242.
Astronomy and Astrophysics
Astronomy
1
Instrumentation: Spectrographs, Techniques: Spectroscopic
Scientific paper
We present a design for a zero-deviation cross-disperser to be used with Hectochelle, a fiber-fed echelle spectrograph. Hectochelle was originally designed to be operated as a multiobject spectrograph in a single order (or overlapping orders) selected with order-separating filters. With cross-dispersion, the multiplex advantage can be traded for spectral coverage using order-separating filters and masks at the fiber slit. The options range from using two fibers delivering the full 365-980 nm passband to 240 fibers delivering a single order (~10-20 nm). The cross-disperser is a novel segmented prism design, which is compact, efficient, and economical compared to a monolithic zero-deviation prism. Conveniently, the cross-disperser can be mounted in the existing Hectochelle spectrograph without mechanical modifications or optical realignment.
Epps Harland W.
Fabricant Daniel G.
Szentgyorgyi Andrew
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