SpeX Science Modes

The primary science objectives of the instrument can be met with the two cross-dispersed modes. The secondary science objectives include two long-slit modes, and a low-resolution mode for occultations and faint object spectroscopy. Each of these modes occupies one position in the grating turret. Spectral resolutions are proportional to the slit-width and should be selected as appropriate to seeing and diffraction. The spectral resolution for the following modes is based on the narrowest slit available:

The slit-viewer may also be used as a 0.8-5.5 micron imager, covering a 60x60 arcsec field-of-view at 0.12arcsec/pixel.