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L. W. Ramsey, L. Engel, B. Rhoads, J. Maywalt, K. McGouldrick, D. R. Andersen (Penn State University)
The Medium Resolution Spectrograph (MRS) is a versatile, fiber-fed dual beam echelle spectrograph for the Hobby-Eberly Telescope (HET). This instrument is designed for a wide range of scientific investigations; it includes single-fiber inputs for the study of point-like sources, synthetic slits of fibers for long slit spectroscopy, multi-fiber inputs for multi-object spectroscopy, and an optical fiber integral field unit. The MRS will have resolving power ranging from 3500 to 20,000 depending on the fiber/slit combination selected. The initial, visible wavelength beam will have wavelength coverage from 450 - 900 nm in a single exposure. Later, a second beam operating in the near-infrared will be added which will have coverage of 950-1300 nm in a single exposure and capability out to 1800 nm. We detail the fiber input and spectral coverage options on the HET as well as present performance goals.