CRIRES (Cryogenic Infrared Echelle Spectrometer) is a high Spectral-Resolution Infrared Spectrograph on European Southern Observatory Very Large Telescope (ESO VLT). Its resolution reaches 100,000, in the 1-5 μm range. Among its goals is Radial Velocity measurements to study Binary Stars and Extra Solar Planets.
It is currently being upgraded and will be called CRIRES+.
European Southern Observatory Very Large Telescope (ESO VLT)
Spectral Resolution (R)