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Proceedings Paper

Multi-object adaptive optics on-sky results with Raven
Author(s): Olivier Lardière; Dave Andersen; Célia Blain; Colin Bradley; Darryl Gamroth; Kate Jackson; Przemek Lach; Reston Nash; Kim Venn; Jean-Pierre Véran; Carlos Correia; Shin Oya; Yutaka Hayano; Hiroshi Terada; Yoshito Ono; Masayuki Akiyama
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Paper Abstract

Raven is a Multi-Object Adaptive Optics (MOAO) technical and science demonstrator which had its first light at the Subaru telescope on May 13-14, 2014. Raven was built and tested at the University of Victoria AO Lab before shipping to Hawai`i. Raven includes three open loop wavefront sensors (WFSs), a central laser guide star WFS, and two independent science channels feeding light to the Subaru IRCS spectrograph. Raven supports different kinds of AO correction: SCAO, open-loop GLAO and MOAO. The MOAO mode can use different tomographic reconstructors, such as Learn-and-Apply or a model-based reconstructor. This paper presents the latest results obtained in the lab, which are consistent with simulated performance, as well as preliminary on-sky results, including echelle spectra from IRCS. Ensquared energy obtained on sky in 140mas slit is 17%, 30% and 41% for GLAO, MOAO and SCAO respectively. This result confirms that MOAO can provide a level of correction in between GLAO and SCAO, in any direction of the field of regard, regardless of the science target brightness.

Paper Details

Date Published: 21 July 2014
PDF: 14 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91481G (21 July 2014); doi: 10.1117/12.2055480
Show Author Affiliations
Olivier Lardière, Univ. of Victoria (Canada)
Dave Andersen, NRC - Herzburg Institute of Astrophysics (Canada)
Célia Blain, Univ. of Victoria (Canada)
Colin Bradley, Univ. of Victoria (Canada)
Darryl Gamroth, Univ. of Victoria (Canada)
Kate Jackson, Univ. of Victoria (Canada)
Przemek Lach, Univ. of Victoria (Canada)
Reston Nash, Univ. of Victoria (Canada)
Kim Venn, Univ. of Victoria (Canada)
Jean-Pierre Véran, National Research Council Canada (Canada)
Carlos Correia, Univ. do Porto (Portugal)
Shin Oya, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Yutaka Hayano, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Hiroshi Terada, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Yoshito Ono, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Tohoku Univ. (Japan)
Masayuki Akiyama, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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