AO4ELT5 Proceedings
Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS
Bardou, Lisa (LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon, France), Gendron, Éric (LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon, France), Rousset, Gérard (LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon, France), Gratadour, Damien (LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon, France), Basden, Alastair G. (Department of Physics, Durham University, South Road, Durham DH1 3LE, UK), Bonaccini Calia, Domenico (European Southern Observatory, D-85748 Garching, Germany), Buey, Tristan (LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC, Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon, France), Centrone, Mauro (INAF-OAR National Institute for Astrophysics, Via Frascati 33, I-00078 Monte Porzio Catone (RM), Italy), Chemla, Fanny (GEPI, Observatoire de Paris, PSL Research University, CNRS, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon), Gach, Jean-Luc (First Light Imaging S.A.S., Europarc Sainte Victoire Bâtiment 6, Route de Valbrillant, Le Canet, F-13590 Meyreuil, France), Lombardi, Gianluca (Gran Telescopio Canarias, Cuesta de San José, s/n - E-38712, Breña Baja, La Palma, Spain), Marchetti, Enrico (European Southern Observatory, D-85748 Garching, Germany), Morris, Timothy J. (Department of Physics, Durham University, South Road, Durham DH1 3LE, UK), Myers, Richard M. (Department of Physics, Durham University, South Road, Durham DH1 3LE, UK), Osborn, James (Department of Physics, Durham University, South Road, Durham DH1 3LE, UK), Townson, Matthew (Department of Physics, Durham University, South Road, Durham DH1 3LE, UK), Vidal, Fabrice (LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC, Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92190 Meudon, France), Reyes García-Talavera, Marcos (Instituto de Astrofisica de Canarias, via Lactea, E-38205 La Laguna, Tenerife, Spain)
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.
DOI: 10.26698/AO4ELT5.0126- Proceeding PDF
