SpeX ==== 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., 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, doi:10.1117/12.551107. 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, doi:10.1086/367745.