AAT Instrument - IRIS is a decommissioned instrument and is no longer offered or supported at the AAT.
|In Brief||IRIS provides imaging and spectroscopic modes over 0.9 - 2.5 microns. Imaging polarimerty and spectropolarimetry modes are also availabe. Chopping secoundary f/36 top end of f/15 end can be used.|
|Instrument Scientist||No Instrument Scientist at present. Contact Head of Astronomy for information.|
|Manual||AAO UM-30a "IRIS Users' Guide" Allen, D.A., 1993 (considerably out-of-date)|
|Other Info||There is an entry in the Observing Guide.|
|Dectector||128 x 128 HgCd Te array detector with 60 micron square pixels.|
|Focal Station||Mounted at Cassegrain focus with either f/15 or f/36 top end.|
|Image Scale||1.94 and 0.60 arcsec/pixel at f/15
0.79 and 0.24 arcsec/pixel at f/36
|Spectral Resolution*||R=300 with long slit spectroscopy at f/15 at H or K (1"x60" slit) or f/36 (0.4"x25" slit).
R=400 with 1.5×1.5 arcsec slit at f/36 covering 0.9-1.4 microns or 1.5-2.5 microns.
|Filters||Broad band J, H, K, K', Kn
Intermediate band (R~25) centred at 2.21, 2.34 microns
Narrow band (R~100) Br gamma, H2 2.122 microns
|Polarimetry||imaging polarimetry available at 0.60 and 0.24 arcsec/pixel. Spectropolarimetry available at f/15 (R=300 H, K)|
|Sensitivities||Photometry at f/36, 0.79 arcsec/pixel, 5 sigma in 2"x2" aperture after 1 min at J=1.8.5, H=18.3, K=16.8, K'=17.4, Kn=17.4
Spectroscopy at f/36; 3 sigma in 1000s for J=17, H=16, K=15.05 magnitude deeper at f/15
|* Spectral Resolution R measuered as lambda/delta_lambda, delta_lambda = FWHM unresolved line, usually 2 pixels|
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