CTIO 1.5-METER CASSEGRAIN SPECTROGRAPH
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  Instrument Overview                                                         
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    The CTIO 1.5-meter Cassegrain spectrograph is an ultraviolet              
    transmitting grating spectrograph which is used at the f/7.5 focus        
    where the scale is 18.1 arcseconds/mm. It is identical to the             
    2.1-meter telescope White Cassegrain spectrograph at Kitt Peak            
    National Observatory and therefore allows one to obtain similar           
    spectrograms in both hemispheres.                                         
                                                                              
    Plate Scale (at f/7.5 focal plane)      18.06 arcsec/mm                   
    Slit Length     25.4 mm, 459.7 arcsec                                     
    Collimator Focal Length         766.1 mm                                  
    Point source collimated beam diameter   101.6 mm                          
    Collimator-to-Camera Angle      55 degrees                                
    Grating size    127152 mm                                                 
    Camera Focal Length     160 mm                                            
    Demagnification         4.788                                             
    Plate Scale (at detector)       86.7 arcsec/mm