Capability

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IGRINS has no moving parts, and offers near-infrared spectra between 1.45-2.45μm high-resolution (R=50,000). The slit size in the spectral direction is 0.34ʺ, and in the spatial direction is 5ʺ. The plate scale on the imaging detector is ~0.041"/pix, and ~0.091"/pix in the spatial direction of the 2-D spectrum. An example of reduced 2D spectra are shown below. 

Credit: G. Mace/IGRINS instrument team

Guiding

IGRINS uses the P2 WaveFront Sensor for guiding. However, in exceptional circumstances, targets with bright guide stars have used the P1 WaveFront Sensor for guiding.