IRIS2 Overview

The IRIS2 infrared imager and spectrograph was built in-house by the AAO, and commissioned between October 2001 and July 2002. It provides the AAO with an infrared facility for

  • Wide field imaging (~8'x8') with a pixel scale of 0.4486"/pixel
  • Moderate resolution (R=2400) long-slit spectroscopy, and
  • Moderate resolution (R=2400) multi-object spectroscopy (from 2016B onwards, the MOS mode will no longer be available)

If you have any queries about the status or use of IRIS2, please do not hesitate to contact the Instrument Scientist, Chris Lidman (

Papers making use of data from IRIS2 should refer to the IRIS2 technical description by Tinney et al. 2004 (Proc. SPIE, 5492, 998).

Below, an image of the Orion Nebula taken with IRIS2 in the H2 v=1-0 molecular line. 

An image of the Orion Nebula taken with IRIS2