Echellette mode
10 orders on 2x4K chip
Spectral range 0.39 to 1.09 microns
R=26,000/15 micron pixel
50% throughput
Low Dispersion Mode
Spectral range 0.39 to 1.09 microns
R~6000/ 15 micron pixel @3900A, R~4000/15 micron pixel @11000A
70% throughput
(Up to 50 slitlets)
Imaging Mode
Image quality of 1.2 pixels FWHM over full field 2x8 minutes of arc
75% throughput
Image Stability
2 pixel in 2 hours integration
Fits within the Cass instrument envelope
Fits in the Cass rotator module
Weighs 2 metric tons or less
Balances on the axis of the Cass rotator bearing
Connects directly to the Cass interface panels