NIRI

Gemini NorthNear-IR

Last Modified:

Tuesday, March 12, 2024 - 08:40

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.

Unavailable For Proposals at Gemini North
For more details, see the schedules and the CfPs.
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Capability Summary

AO (NGS, LGS, Super Seeing) available with Altair
Total wavelength range = 1−5 µm

Imaging (Read more)

Three choices of cameras:

Camera	Sampling	FOV	comments
f/32	0.022"/pixel	22"x22"	best suited for 2.5−5 µm
f/14	0.050"/pixel	51" x 51"	no M band
f/6	0.117"/pixel	120"×120"	not offered with AO best suited for 1−2.5 µm

A large number of broad- and narrowband filters

Spectroscopy

DECOMMISSIONED

Guiding Options (Read more)

PWFS
Altair (NGS, LGS, LGS+P1)

Get the sensitivity
Get to the integration time calculator

NIRI was built by the University of Hawaii's Institute for Astronomy.

The current primary reference to be cited by users of NIRI on Gemini is:

"The Gemini Near-Infrared Imager (NIRI)", Hodapp, Klaus W.; Jensen, Joseph B.; Irwin, Everett M.; Yamada, Hubert; Chung, Randolph; Fletcher, Kent; Robertson, Louis; Hora, Joseph L.; Simons, Douglas A.; Mays, Wendy; Nolan, Robert; Bec, Matthieu; Merrill, Michael; Fowler, Albert M., (2003), PASP, 115, p. 1388-1406

To be cited by users of NIRI in any of its modes

OPTICAL FLOWCHART - NIRI SCIENCE PATH