urn:nasa:pds:context:instrument:mcdonald.harlanjsmith_2m7.lcs 1.0 1.15.0.0 Product_Context 2023-01-31 1.0 Initial export from OLAF urn:nasa:pds:context:telescope:mcdonald.harlanjsmith_2m7 instrument_to_telescope Large Cassegrain Spectrometer Spectrometer Instrument Overview =================== Large Cassegrain Spectrometer on the McDonald Observatory 2.7m Telescope The information included here was extracted from the McDonald Observatory web site are: http://mcdonaldobservatory.org/ on 24 April 2002 by A.C.Raugh. For additional information, including a list of gratings, S/N examples and manuals, see the McDonald Observatory web site. The Large Cassegrain Spectrometer (LCS) sits at the Cassegrain f/17.7 focus of the 2.7m Harlan J. Smith telescope. The web site above provides this general description: A low-to-moderate-resolution spectrometer (R = 600-2,500) for faint object work available with TI1 and CC1 CCDs. Various gratings provide wavelength coverage from 0.3 to 1.1 microns. The LCS has long slit (150 arcsec) capability and CCD-based guiding and acquisition. Limiting magnitude m[v]=20.