NIRI

NIRI is used as the main NIR imager at Gemini North. It has three cameras, and a large number of broad- and narrow band filters are available. The Gemini facility adaptive optics (AO) system, ALTAIR, (either with a natural guide star or the laser guide star), is available for use with NIRI f/32 for J-L' imaging and NIRI f/14 for imaging out to 2.5 microns. The advantage of AO at L' is modest and is only for point sources.