SPEX
====

  Instrument Overview                                                         
  ===================                                                         
    Low- to medium-resolution near-IR spectrograph and imager at the NASA IRTF
    on Mauna Kea.  The spectrograph employs a 1024x1024 Aladdin 3 InSb array  
    along with various slits, gratings and prism cross-dispersers to produce  
    spectra with resolving powers up to R ~ 2000 across the wavelength        
    intervals 0.8 to 2.5 microns and 2 to 5.5 microns.   The slit-viewing     
    imager uses a 512x512 Aladdin 2 InSb array that covers a 60x60 arcsec     
    field of view at a image scale of 0.12 arcsec per pixel.  In addition to  
    object acquisition and scientific imaging, the imaging array is used as an
    infrared auto-guider for the spectrograph.

References
==========

Rayner, J. T., D. W. Toomey, P. M.      
        Onaka, A. J. Denault, W. E. Stahlberger, and 3 others, SpeX: A        
        Medium-Resolution 0.8 - 5.5 micron Spectrograph and Imager for the    
        NASA Infrared Telescope Facility, PASP 115, 362, 2003.

Rayner, J.T., P. M. Onaka, M. C. Cushing
        and W. D. Vacca, Four Years of Good SpeX, in Ground-based             
        Instrumentation for Astronomy, A. F. M. Moorwood and M. Iye, Eds.,    
        Proceedings of the SPIE, vol. 5492, pp. 1498-1509, 2004.