Description and Specifications

General Aspects
Focal Station Nasmyth
Wavelength range 0.9 - 2.5 microns
Optimization 1.0 - 2.5 microns
Spectral resolution 4000 for Z, J and H bands; 3500 for K band
Spectral coverage One observing window (Z, J, H and K) per single exposure
Array format Rockwell HgCdTe 2048 x 2048
Scale at detector 0.2 arcsec per pixel
Limiting magnitude J=25.5, H = 24.5, K = 23.5 for S/N = 5; t = 4 hours
OH suppression In software
Cryostat
Spectrograph temperature 77 K
Multi-object Spectroscopy Mode
Multi-object selection Multislit mask interchanger
FOV 6 arcmin x 4 arcmin
Imaging Mode
FOV 6 arcmin x 6 arcmin
Plate scale 0.2 arcsec per pixel
Filters Bands Z, J, H, K and K'; narrow band filters (to be defined)