LARSON IHW SPECTROGRAPH
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  Instrument Overview                                                         
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    The Larson IHW spectrograph coupled a spectrograph with a                 
    two-dimensional CCD camera.  It was designed and built by Steve           
    Larson for the International Halley Watch program.  It covered the        
    wavelength interval 0.33 - 0.85 microns, with a spectral                  
    resolution of 23 A.  Further information about this spectrograph          
    has not been found.