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Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS.

Bardou, Lisa and Gendron, Eric and Rousset, Gérard and Gratadour, Damien and Basden, Alastair G. and Bonaccini, Domenico and Buey, Tristan and Centrone, Mauro and Chemla, Fanny and Lombardi, Gianluca and Marchetti, Enrico and Morris, Timothy J and Myers, Richard M. and Osborn, J. and Townson, Matthew J. and Vidal, Fabrice and Reyes Garcia-Talavera, Marcos (2017) 'Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS.', in Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017. Tenerife: Instituto de Astrofísica de Canarias.


We present on-sky results of wavefront sensing on an elongated LGS. These results are derived from observations made with the multi-object AO demonstrator CANARY on the William Herschel Telescope (WHT) in La Palma. The laser guide star is produced using ESO’s transportable Wendelstein LGS unit placed 40 meters away from the WHT so as to replicate the elongations that will be seen on the European ELT. In this analysis, we evaluate the impact of spot truncation and sub-sampling on the wavefront measurements made with the elongated LGS.

Item Type:Book chapter
Full text:Publisher-imposed embargo
(AM) Accepted Manuscript
File format - PDF
Status:Not peer-reviewed
Publisher Web site:
Date accepted:No date available
Date deposited:02 May 2018
Date of first online publication:2017
Date first made open access:No date available

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