CYCLOPS: A fibre feed for UCLES

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CYCLOPS A fibre feed for UCLES

• Simon OToole - AAO
• (A concept by Chris Tinney, David Lee, Roger
  Haynes Anna Moore)

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UCLES and the AAT

• UCLES is a highly competitive high-resolution
  spectrograph with a very stable PSF
• However
• Maximal resolution (R80000) requires a 0.5
  slit (with 15 ?m pixels)
• AAT median seeing is 1.5
• use 1 slits ? R45000
• UCLES full potential is not being realised
• A fibre feed at the Prime Focus will solve this
  problem

3
UCLES Science

• Planet Search
• Asteroseismology and Stellar Pulsation
• Doppler Tomography
• Stellar Abundances
• ISM studies

4
Instrument concept

• Prime Focus SPIRAL-style fibre feed mounted at
  one of 90? positions on the 2dF tumbler
• Use 2dF Focal Plane Imager for acquisition and
  guiding
• Optical fibre bundle with 2 diameter
• Exit slit feeding UCLES with a slit width
  equivalent to 0.58
• This will give a resolution of 78000 with
  minimal slit losses

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Advantages

• Improved throughput
• 38 at 4000Å
• gt100 at 6000Å
• Operational
• UCLES could be scheduled between AAOmega runs
  with no top-end changes
• Science
• Dramatic efficiency increases i.e. more targets
  in less time in all seeing conditions

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Summary

• CYCLOPS will keep the AAO a world-leader in
  high-resolution spectroscopy of bright objects
• It will make UCLES robust against AAT seeing
  conditions
• At the same time, it will improve resolution and
  throughput