ULTIMATE: a deployable multiple integral field unit for Subaru

S. C. Ellis*, Ross Zhelem, David Brown, Nicholas F. Staszak, Chris Lidman, David M. Nataf, Andrew R. Casey, Pascal Xavier, Andrew Sheinis, Peter Gillingham, Julia Tims, Jon Lawrence, Julia Bryant, Rob Sharp

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

6 Citations (Scopus)


ULTIMATE is an instrument concept under development at the AAO, for the Subaru Telescope, which will have the unique combination of ground layer adaptive optics feeding multiple deployable integral field units. This will allow ULTIMATE to probe unexplored parameter space, enabling science cases such as the evolution of galaxies at z ∼ 0:5 to 1.5, and the dark matter content of the inner part of our Galaxy. ULTIMATE will use Starbugs to position between 7 and 13 IFUs over a 14 × 8 arcmin field-of-view, pro- vided by a new wide-field corrector. All Starbugs can be positioned simultaneously, to an accuracy of better than 5 milli-arcsec within the typical slew-time of the telescope, allowing for very efficient re-configuration between observations. The IFUs will feed either the near-infrared nuMOIRCS or the visible/ near-infrared PFS spectrographs, or both. Future possible upgrades include the possibility of purpose built spectrographs and incorporating OH suppression using fibre Bragg gratings. We describe the science case and resulting design requirements, the baseline instrument concept, and the expected performance of the instrument.

Original languageEnglish
Title of host publicationGround-based and Airborne Instrumentation for Astronomy VI
EditorsChristopher J. Evans, Luc Simard, Hideki Takami
Place of PublicationBellingham, WA
Number of pages19
ISBN (Electronic)9781510601963
ISBN (Print)9781510601956
Publication statusPublished - 9 Aug 2016
Externally publishedYes
EventGround-Based and Airborne Instrumentation for Astronomy VI - Edinburgh, United Kingdom
Duration: 26 Jun 201630 Jun 2016

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherGround-Based and Airborne Instrumentation for Astronomy VI
Country/TerritoryUnited Kingdom


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