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THE CERRO TOLOLO INTER-AMERICAN OBSERVATORY INFRARED SPECTROMETER

Inter-American Observatory. The instrument has a slit of modest length and a selection of gratings that allow resolutions (λ/{DELTA}λ) from ~150 to ~3000 over the wavelength range covered by its photovoltaic InSb array: 0.9 microns to 5 microns. The design and operating characteristics of the IRS are described, and observing procedures and data-reduction techniques are outlined for potential users.