PDS_VERSION_ID      = PDS3                                                    
LABEL_REVISION_NOTE = "                                                       
   5 Nov 2002, T.L. Farnham, Creation                                         
  18 Jul 2003, A.C. Raugh    Lien-resolution editing                          
  "                                                                           
OBJECT     = INSTRUMENT                                                       
  INSTRUMENT_ID      = "LCS"                                                  
  INSTRUMENT_HOST_ID = "MCD27M"                                               
                                                                              
  OBJECT     = INSTRUMENT_INFORMATION                                         
    INSTRUMENT_NAME = "LARGE CASSEGRAIN SPECTROGRAPH"                         
    INSTRUMENT_TYPE = "SPECTROGRAPH"                                          
    INSTRUMENT_DESC ="                                                        
                                                                              
      Instrument Overview                                                     
      ===================                                                     
      The Large Cassegrain Spectrograph (LCS) is a conventional long-slit     
      CCD spectrograph with changeable gratings and slits.  Wavelength        
      coverage is 0.2 to 1.1 microns.  Resolution is low to moderate          
      (R = 600 to 2500).  Two CCD detectors (TI1 and CC1) are available.      
                                                                              
      The following is quoted from ''McDonald Observatory Facilities          
      and Instruments'' (Revised 28 Feb 2003), available from the             
      McDonald Observatory web site at http://www.as.utaxes.edu/mcdonald.     
                                                                              
         The LCS has long slit (150 arcsec) capability and CCD-based          
         guiding and acquisition.  Limiting magnitude mv=20.  The             
         TI1 CCD has better QE at all wavelengths but suffers from            
         severe fringing for wavelength redward of 6000 Angstroms;            
         thus for read work, CC1 is the better choice.  Both chips            
         can be used all the way to the atmospheric cutoff, but TI1           
         is better than CC1 in the blue.                                      
                                                                              
      The instrument scientist for the LCS is Dr. Anita Cochran.              
      "                                                                       
                                                                              
  END_OBJECT = INSTRUMENT_INFORMATION                                         
                                                                              
  OBJECT     = INSTRUMENT_REFERENCE_INFO                                      
    REFERENCE_KEY_ID = "N/A"                                                  
  END_OBJECT = INSTRUMENT_REFERENCE_INFO                                      
                                                                              
END_OBJECT = INSTRUMENT                                                       
                                                                              
END