Details

Autor(en) / Beteiligte

• Fabricant, Daniel G.
• Szentgyorgyi, Andrew
• Epps, Harland W.

Titel

Segmented Zero‐Deviation Cross‐Dispersion Prisms for the Hectochelle Multiobject Spectrograph

Ist Teil von

• Publications of the Astronomical Society of the Pacific, 2003-02, Vol.115 (804), p.235-242

Ort / Verlag

The University of Chicago Press

Erscheinungsjahr

2003

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.