Preliminary On-Sky Results of the CANARY Experiment with an ELT-Elongated Sodium LGS

Lisa Bardou, Eric Gendron, Gérard Rousset, Damien Gratadour, Alastair G. Basden, Domenico Bonaccini Calia, Tristan Buey, Mauro Centrone, Fanny Chemla, Jean Luc Gach, Gianluca Lombardi, Enrico Marchetti, Timothy J. Morris, Richard M. Myers, James Osborn, Matthew Townson, Fabrice Vidal, Marcos Reyes García-Talavera

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationAO4ELT5 Proceedings
Number of pages9
Publication statusPublished - 17 Oct 2017
Externally publishedYes
Event5th Adaptive Optics for Extremely Large Telescopes, AO4ELT5 2017 - The Gran Teide Room, Hotel Botánico, Puerto de la Cruz, Tenerife, Canary Islands, Spain
Duration: 25 Jun 201730 Jun 2017


Conference5th Adaptive Optics for Extremely Large Telescopes, AO4ELT5 2017
Abbreviated titleAO4ELT5
CityTenerife, Canary Islands
Internet address

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