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Proceedings Paper

Performance of Subaru adaptive optics system and the scientific results
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Paper Abstract

We present an overview of Subaru Cassegrain adaptive optics system and its performance verified at the engineering run. The system is based on a curvature wavefront sensor with 36-element sub-apertures and a bimorph deformable mirror with identical number of elements. We had the first light in Dec. 2000. The AO system has been in service for two instruments, IRCS; infrared camera and spectrograph, and CIAO; coronagraph imager with adaptive optics. The Strehl ratio at the K band is around 0.30 under 0.4- 0.5 arcsec K-band seeing condition for bright guide stars. The sensitivity of the wavefront sensor is so high that we have significant improvement of image quality even for a faint guide star down to R=18th magnitude. The measurement of stars in a globular cluster suggests an isoplanatic angle, about 40 arcsec, wider than that expected from the equivalent turbulence layer assumed at the height of 6.5 km. The system has been offered for common use since Apr. 2002. Some scientific results using this AO system are shown in this paper.

Paper Details

Date Published: 7 February 2003
PDF: 11 pages
Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); doi: 10.1117/12.459239
Show Author Affiliations
Hideki Takami, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Naruhisa Takato, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Yutaka Hayano, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Masanori Iye, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Yukiko Kamata, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Yosuke Minowa, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Tomio Kanzawa, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Wolfgang Gaessler, National Astronomical Observatory of Japan (United States)
Max-Planck-Institut fuer Astronomie (Germany)


Published in SPIE Proceedings Vol. 4839:
Adaptive Optical System Technologies II
Peter L. Wizinowich; Domenico Bonaccini, Editor(s)

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