RIMAS 
Rapid infrared IMAger-Spectrometer 

RIMAS is a  combination of an imager, low resolution spectrometer and high res cross dispersed echelle spectrometer. This is a development of a consortium between GSFC, Astronomy Department of University of Maryland at College Park and Lowell Observatory. The instrument will be a facility instrument at the new Discovery Channel Telescope due to be commissioned in 2012.

The instrument specifications:

•   spectral range: 0.9 µm  - 2.4 µm
•   FOV :  3’ diameter 
•   two spectral bands: short wavelength band 0.9 µm to 1.4 µm (“YJ band”) 1.4 µm to 2.4 µm (“HK band”) are split by a dichroic, imaged onto 2 detectors
•   detectors: two H2RG detectors 1.7 µm YJ band and 2.5 µm detector in HK band
  
• modes:
• imaging in Y and J, and H and K bands,
• low res R~25 : single object (long slit) or objective prism mode,
• high res R~5000 grism with a cross disperser single object, slit ~ 7” long
• all cooled optics (the collimator and the cameras are inside the dewar)
• primary filter wheels: 5 positions each:
• two for low and high res spectroscopy,
• three for imaging/filters
• plate scale 0.35”/detector pixel
• instrument imaging quality: 0.35” 50% EE as built
• front focal plane assembly
• slit wheel:
  
• 3 reflective slits,
  
• 1 pick-off mirror for the Fibre Bragg Grating (FBG) suppressor,
  
• 1 - clear for the imaging mode,
  
• 2 - TBD
  
• specialty filter wheel  - 8 positions
• reflective slit viewer 80" FOV InSb detector