21 July 2014 Multi-object adaptive optics on-sky results with Raven
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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.
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Olivier Lardière, Olivier Lardière, Dave Andersen, Dave Andersen, Célia Blain, Célia Blain, Colin Bradley, Colin Bradley, Darryl Gamroth, Darryl Gamroth, Kate Jackson, Kate Jackson, Przemek Lach, Przemek Lach, Reston Nash, Reston Nash, Kim Venn, Kim Venn, Jean-Pierre Véran, Jean-Pierre Véran, Carlos Correia, Carlos Correia, Shin Oya, Shin Oya, Yutaka Hayano, Yutaka Hayano, Hiroshi Terada, Hiroshi Terada, Yoshito Ono, Yoshito Ono, Masayuki Akiyama, Masayuki Akiyama, } "Multi-object adaptive optics on-sky results with Raven", Proc. SPIE 9148, Adaptive Optics Systems IV, 91481G (21 July 2014); doi: 10.1117/12.2055480; https://doi.org/10.1117/12.2055480
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