NIRC Specifications

Wavelength 0.8-5.5 microns
Detector InSb (indium antimonide)
Hughes SBRC
256 x 256 pixels
30 micron pixels (38.4" x 38.4")
noise floor = 75 electrons (best timing patterns)
Pixel scale 0.15 arcsec/pixel (38.4" square field)
0.0206 arcsec/pixel (5.3" square field) with image converter
Electronics (IRE) 4 channel parallel readout
16 bit (500 kHz) or 12 bit (2 Mhz) selectable ADCs
coadd 1-128 frames
Motors

Stepper motors:
Inner filter wheel
Outer filter wheel
Slits
Slit mask
Tertiary mirror, yaw
Tertiary mirror, pitch

DC:
Tertiary mirror cover

Filters Two wheels, 20 positions per wheel, for 19mm filters.
Slits 1.5, 2.5, 3.5, 4.5, 8.5, and 16.5 pixel wide slits
Occulting finger
Spectral Resolution lambda/d(lambda) = 164 for 2 pixel slit (all grisms)
Sensitivity K: 1 sigma, 20.4 mag in 1 sec in 1 arcsec box (or 22.3 mag., 10 sigma in 1 hour)
Optics CaF2 window
CaF2 + LiF aspheric achromatic doublet
Gold coated tertiary mirror
Gold coated parabolic field mirror
Gold coated fold mirror
Dewar 13 in. octagon 51 in. in length
40 liter LN2 tank (3.5 day hold time)
15 liter Lhe tank (1.5 day hold time)
Image converter Magnification: 7.292
f/ratio: 182.3
Pixel size: 0.0206 arcsec
Field size: 5.27 arcsec
Optics: 2 flat mirrors, 1 convex sphere, 1 concave sphere, followed by 1 more flat mirror (all gold or gold overcoated)

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