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The High-Resolution Cross-Dispersed Echelle White-Pupil Spectrometer of the McDonald Observatory 2.7-m Telescope
Robert G. Tull, Phillip J. MacQueen, Christopher Sneden and David L. Lambert
Publications of the Astronomical Society of the Pacific
Vol. 107, No. 709 (1995 March), pp. 251-264
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40680530
Page Count: 14
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A new high-resolution cross-dispersed echelle spectrometer has been installed at the coudé focus of the McDonald Observatory 2.7-m telescope. Its primary goal was simultaneously to gather spectra over as much of the spectral range 3400 Å to 1 µm as practical, at a resolution R = λ/Δλ ~ 60.000 with signal-to-noise ratio of ~ 100 for stars down to magnitude 11, using 1-h exposures. In the instrument as built, two exposures are all that are needed to cover the full range. Featuring a white-pupil design, fused silica prism cross disperser, and folded Schmidt camera with a Tektronix 2048 X 2048 CCD used at either of two foci, it has been in regularly scheduled operation since 1992 April. Design details and performance are described.
Publications of the Astronomical Society of the Pacific © 1995 The University of Chicago Press