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Current instruments and detectors

Fully supported instruments

RGO Spectrograph at f/8 with 25 and 82cm cameras and with IPCS and CCDs as detectors. A quarter- and half- wave plate polarimeter is available for use with CCDs and a Pockels cell polarimetry module with the IPCS.

Coudé Echelle Spectrograph (UCLES) with IPCS or CCD detectors. 700mm camera giving a resolving power of 80,000 with the IPCS,  and 44000 with the TEKTRONIX 1K (currently the most commonly used CCD with UCLES).

Faint Object Red Spectrograph (FORS) at f/8  with a dedicated GEC CCD detector; can be combined with the RGO spectrograph using a dichroic beam splitter.

Low Dispersion Survey Spectrograph (LDSS) at f/8, with IPCS or CCD detectors. Dispersions of 164 and 780Å/mm are available.

Autofib 64-fibre feed with 40" field at Cassegrain focus, feeding RGO spectrograph. 320um fibres with extended UV transmission.

FOCAP The earlier FOCAP manual fibre system is still available with 200, 320 or 400um fibres, but may only be used when it offers significant scientific advantages over Autofib. Possible instances are where targets are very closely packed or when either 200um or 400um fibres are strongly preferred. FOCAP can also be used with the 12' field at the auxiliary focus.

Taurus II at f/8 or f/15, with IPCS or CCD detectors and a selection of etalons (see § 5.7). A Wollaston prism polarizing module is also available. Automatic scanning of an etalon with a CCD detector is not feasible.

Optical detectors: (NB:A time series readout mode is available with all the CCDs.)

IRIS: HgCdTe array detector, 128 x 128  array of  pixels 60um square.

Fabry-Perot Infrared Grating Spectrometer (FIGS) with two gratings providing resolving powers of ~ 500 and ~ 1800 for 1 - 5um. Superseded by IRIS and now rarely used.

Infrared Photometer-Spectrometer (IRPS), with standard broad-band JHKL'M filters. Available at chopping f/36. Superseded by IRIS and now rarely used.

Auxiliary Focus Photometer at f/8 and f/15 with S1, S20 or GaAs detector; available with high speed photometry modes, which is the only mode in which it now offers an advatnage over CCD imaging.

Prime Focus for photography with doublet and triplet corrector, and sub-beam prism.

Direct Imaging at Prime Focus, using CCD detectors. The standard f/3.3 system is usually used with the TEKTRONIX 1024x1024  CCD. An f/1 focal reducer is available for wide field imaging; with the Thomson CCD it provides a 16.7' x 16.7' field sampled with 0.98" pixels. The f/1 optics are optimised for use at red wavelengths and have an inferior performance in the blue.

Direct Imaging at the 12' Auxiliary Focus, using CCD detectors. This facility can be provided (upon request) in conjunction with spectroscopy at the Cassegrain focus.

Other instruments

With prior permission from the Director, observers can use other instrumentation on the AAT. Outside instruments which have been used in the past and which are available for use (with the agreement of the owners) are:


Observers proposing to bring a visiting instrument must obtain approval from the Director before submitting a proposal. Please read the document Guidelines for Visitor Instruments to be used on the Anglo Australian Telescope a copy of which can be obtained here.


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This Page Last updated: Feb 21, 1996, by Chris Tinney.