NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The high-resolution cross-dispersed echelle white-pupil spectrometer of the McDonald Observatory 2.7-m telescopeA 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.
Document ID
19950046545
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Tull, Robert G. (University of Texas, Austin, TX United States)
Macqueen, Phillip J. (University of Texas, Austin, TX United States)
Sneden, Christopher (University of Texas, Austin, TX United States)
Lambert, David L. (University of Texas, Austin, TX United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1995
Publication Information
Publication: Astronomical Society of the Pacific, Publications
Volume: 107
Issue: 709
ISSN: 0004-6280
Subject Category
ASTRONOMY
Funding Number(s)
CONTRACT_GRANT: NSF AST-87-16024
Distribution Limits
Public
Copyright
Other