Instrument Description

Main characteristics and specifications

 
Focal Station Nasmyth
Wavelength range 0.9 - 2.5 microns
Optimization 1.0 - 2.5 microns
Spectral resolution 5000, 4250, 4000 for J, H and K bands
Spectral coverage One observing window (Y, J, H and K) per single exposure
Array format HAWAII-2 FPA; 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 h)
Spectrograph temperature 77 K

 

Observing Modes

Imaging Mode
Field of View (FOV) 6.6'x6.6'
Plate Scale 0.193"/pixel
Filters

Broad band: YJHK y K-short
Narrow Band: Brackett- Gamma, FeII, H2(1-0), H2(2-1)

 

Multi-object Spectrocopy Mode                
Field of View (FOV) 6.6' x 4'
Multi-slits Multi-slit Masks