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Proceedings Paper

The Hobby-Eberly telescope medium resolution spectrograph and fiber instrument feed
Author(s): Lawrence W. Ramsey; Leland G. Engel; Nicholas Sessions; Christopher DeFilippo; Michelle Graver; Jeffery Mader
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Paper Abstract

The Medium Resolution Spectrograph (MRS) is a versatile, fiber-fed echelle spectrograph for the Hobby-Eberly Telescope (HET). This instrument is designed for a wide range of scientific investigations and includes single-fiber inputs for the study of point-like sources, synthetic slits of fibers for long slit spectroscopy 9 independently positionable probes for multi-object spectroscopy, and a circular fiber integral field unit. The MRS consists of two beams. The visible beam has wavelength coverage from 450 - 900 nm in a single exposure with resolving power between 5,300 and 20,000 depending on the fibers configuration selected. This beam also has capability in the ranges 380 - 950 nm by altering the angles of the cross-disperser gratings. A second beam operating in the near-infrared has coverage of 900 - 1300 nm with resolving power between 5,300 and 10,000. Both beams can be used simultaneously and are fed by the HET Fiber Instrument Feed (FIF) which is mounted at the prime focus of the telescope and positions the fibers feeding the MRS. The MRS started commissioning summer 2002.

Paper Details

Date Published: 7 March 2003
PDF: 9 pages
Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.459951
Show Author Affiliations
Lawrence W. Ramsey, The Pennsylvania State Univ. (United States)
Leland G. Engel, The Pennsylvania State Univ. (United States)
Nicholas Sessions, The Pennsylvania State Univ. (United States)
Christopher DeFilippo, The Pennsylvania State Univ. (United States)
Michelle Graver, The Pennsylvania State Univ. (United States)
Jeffery Mader, Univ. of Texas at Austin/McDonald Observatory (United States)


Published in SPIE Proceedings Vol. 4841:
Instrument Design and Performance for Optical/Infrared Ground-based Telescopes
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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