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Proceedings Paper

CYCLOPS2: the fibre image slicer upgrade for the UCLES high resolution spectrograph
Author(s): Anthony Horton; C. G. Tinney; Scott Case; Tony Farrell; Luke Gers; Damien Jones; Jon Lawrence; Stan Miziarski; Nick Staszak; David Orr; Minh Vuong; Lew Waller; Ross Zhelem
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Paper Abstract

CYCLOPS2 is an upgrade for the UCLES high resolution spectrograph on the Anglo-Australian Telescope, scheduled for commissioning in semester 2012A. By replacing the 5 mirror Coud´e train with a Cassegrain mounted fibre-based image slicer CYCLOPS2 simultaneously provides improved throughput, reduced aperture losses and increased spectral resolution. Sixteen optical fibres collect light from a 5.0 arcsecond2 area of sky and reformat it into the equivalent of a 0.6 arcsecond wide slit, delivering a spectral resolution of R= 70000 and up to twice as much flux as the standard 1 arcsecond slit of the Coud´e train. CYCLOPS2 also adds support for simultaneous ThAr wavelength calibration via a dedicated fibre. CYCLOPS2 consists of three main components, the fore-optics unit, fibre bundle and slit unit. The fore optics unit incorporates magnification optics and a lenslet array and is designed to mount to the CURE Cassegrain instrument interface, which provides acquisition, guiding and calibration facilities. The fibre bundle transports the light from the Cassegrain focus to the UCLES spectrograph at Coud´e and also includes a fibre mode scrambler. The slit unit consists of the fibre slit and relay optics to project an image of the slit onto the entrance aperture of the UCLES spectrograph. CYCLOPS2 builds on experience with the first generation CYCLOPS fibre system, which we also describe in this paper. We present the science case for an image slicing fibre feed for echelle spectroscopy and describe the design of CYCLOPS and CYCLOPS2.

Paper Details

Date Published: 24 September 2012
PDF: 8 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84463A (24 September 2012); doi: 10.1117/12.924945
Show Author Affiliations
Anthony Horton, Australian Astronomical Observatory (Australia)
C. G. Tinney, The Univ. of New South Wales (Australia)
Scott Case, Australian Astronomical Observatory (Australia)
Tony Farrell, Australian Astronomical Observatory (Australia)
Luke Gers, Australian Astronomical Observatory (Australia)
Damien Jones, Prime Optics (Australia)
Jon Lawrence, Australian Astronomical Observatory (Australia)
Stan Miziarski, Australian Astronomical Observatory (Australia)
Nick Staszak, Australian Astronomical Observatory (Australia)
David Orr, Australian Astronomical Observatory (Australia)
Minh Vuong, Australian Astronomical Observatory (Australia)
Lew Waller, Australian Astronomical Observatory (Australia)
Ross Zhelem, Australian Astronomical Observatory (Australia)

Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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