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

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

Abstract

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.

Citation

Bardou, L., Gendron, E., Rousset, G., Gratadour, D., Basden, A. G., Bonaccini, D., Buey, T., Centrone, M., Chemla, F., Lombardi, G., Marchetti, E., Morris, T. J., Myers, R. M., Osborn, J., Townson, M. J., Vidal, F., & Reyes Garcia-Talavera, M. (2017, June). Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS. Presented at Adaptive Optics for Extremely Large Telescopes 5, Tenerife, Canary Islands, Spain

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Adaptive Optics for Extremely Large Telescopes 5
• Start Date: Jun 25, 2017
• End Date: Jun 30, 2017
• Publication Date: Jan 1, 2017
• Deposit Date: May 1, 2018
• Book Title: Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017.
• DOI: https://doi.org/10.26698/ao4elt5.0126
• Public URL: https://durham-repository.worktribe.com/output/1145574