Status of the GRAAL system development: very wide-field correction with 4 laser guide-stars

J. Paufique; J. Argomedo; R. Arsenault; R. Conzelmann; R. Donaldson; N. Hubin; L. Jochum; A. Jost; M. Kiekebusch; J. Kolb; H. Kuntschner; M. Le Louarn; P-Y. Madec; R. Siebenmorgen; S. Tordo

doi:10.1117/12.927265

13 September 2012 Status of the GRAAL system development: very wide-field correction with 4 laser guide-stars

J. Paufique, J. Argomedo, R. Arsenault, R. Conzelmann, R. Donaldson, N. Hubin, L. Jochum, A. Jost, M. Kiekebusch, J. Kolb, H. Kuntschner, M. Le Louarn, P-Y. Madec, R. Siebenmorgen, S. Tordo

Author Affiliations +

Proceedings Volume 8447, Adaptive Optics Systems III; 844738 (2012) https://doi.org/10.1117/12.927265
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

We recall the design and present the development status of GRAAL, the Ground-layer adaptive optics assisted by Laser, which will deliver wide-field (10 arcmin), enhanced images to the HAWK-I instrument on the VLT, with an improved seeing. GRAAL is an adaptive optics module, part of the Adaptive optics facility (AOF), using four Laser- and one natural guide-stars to measure the turbulence, and correcting for it by deforming the adaptive secondary mirror of a Unit telescope in the Paranal observatory. GRAAL is in the laboratory in Europe and the integration of its laser guide-star optics is completed. The first wave-front sensor camera will be ready for its integration in the coming weeks, allowing the first system tests to start.

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J. Paufique, J. Argomedo, R. Arsenault, R. Conzelmann, R. Donaldson, N. Hubin, L. Jochum, A. Jost, M. Kiekebusch, J. Kolb, H. Kuntschner, M. Le Louarn, P-Y. Madec, R. Siebenmorgen, and S. Tordo "Status of the GRAAL system development: very wide-field correction with 4 laser guide-stars", Proc. SPIE 8447, Adaptive Optics Systems III, 844738 (13 September 2012); https://doi.org/10.1117/12.927265

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