Multi-object adaptive optics on-sky results with Raven

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

doi:10.1117/12.2055480

21 July 2014 Multi-object adaptive optics on-sky results with Raven

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

Author Affiliations +

Proceedings Volume 9148, Adaptive Optics Systems IV; 91481G (2014) https://doi.org/10.1117/12.2055480
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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, 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, and Masayuki Akiyama "Multi-object adaptive optics on-sky results with Raven", Proc. SPIE 9148, Adaptive Optics Systems IV, 91481G (21 July 2014); https://doi.org/10.1117/12.2055480

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