Computer Science – Performance
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasp..107..251t&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 107, no. 709, p. 251-264
Computer Science
Performance
241
Broadband, Design Analysis, Echelle Gratings, High Resolution, Performance Tests, Spectrometers, Telescopes, Efficiency, Engineering Drawings, Optical Equipment, Schmidt Cameras
Scientific paper
A new high-resolution cross-dispersed echelle spectrometer has been installed at the coude 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 A to 1 micrometer as practical, at a resolution R identical with lambda/Delta lambda which approximately = 60,000 with signal-to-noise ratio of approximately 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 2048x2048 CCD used at either of two foci, it has been in regularly scheduled operation since 1992 April. Design details and performance are described.
Lambert David L.
MacQueen Phillip J.
Sneden Christopher
Tull Robert G.
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