AAT Instrument.
IRIS provides imaging and spectroscopic modes over 0.9 - 2.5 um. Imaging
polarimetry and spectropolarimetry modes are also available. Chopping
secondary f/36 top end or f/15 top end can be used.
Instrument Scientist: Stuart Lumsden (sll@aaoepp.aao.gov.au}
A service observing programme is available for projects requiring < 3hrs.
Manual: AAO UM-30a `IRIS Users' Guide' Allen, D. A., 1993 is available
online , but is considerably out of date.
Detector: 128 x 128 HgCdTe array detector with 60 um sq pixels.
Focal Station: mounted at Cassegrain, 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/pix at f/36
Spectral Resolution*: R=300 with long slit spectroscopy at f/15 at H or K
(1" x 60" slit) or f/36 (0.4" x 25" slit).
R=400 with 1.5 x 15 arcsec slit at f/36, covering
0.9 - 1.4 um or 1.5 - 2.5 um.
Filters: Broad band J, H, K, K', Kn
Intermediate band (R~25) centred 2.21, 2.34 um
Narrow band (R~100) Br gamma, H2 2.122 um
Polarimetry: Imaging polarimetry available at 0.60 and 0.24 arcsec/pix
Spectropolarimetry available at f/15 (R=300 H,K)
Sensitivities: Photometry at f/36, 0.79 arcsec/pixel, 5 sigma in 2" x 2"
aperture after 1 min at J=18.5, 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. 0.5 magnitude deeper at f/15.
* Spectral Resolution R measured as lambda / delta_lambda,
delta_lambda = FWHM unresolved line, usually 2 pixels.