AO4ELT5 Proceedings
Na LGS height profiles at Teide Observatory, Canary Islands.
Castro-Almazan, Julio (Instituto de Astrofisica de Canarias and Dept. Astrofisica. Universidad de La Laguna), Alonso, Angel (Instituto de Astrofisica de Canarias and Dept. Astrofisica. Universidad de La Laguna), Bonaccini Calia, Domenico (European Southern Observatory), Centrone, Mauro (INAF-OAR National Institute for Astrophysics), Lombardi, Gianluca (Gran Telescopio Canarias), Montilla, Iciar (Instituto de Astrofisica de Canarias and Dept. Astrofisica. Universidad de La Laguna), Muñoz-Tuñon, Casiana (Instituto de Astrofisica de Canarias and Dept. Astrofisica. Universidad de La Laguna), Reyes, Marcos (Instituto de Astrofisica de Canarias and Dept. Astrofisica. Universidad de La Laguna)
The Na Laser Guide Star (LGS) spots appear elongated in the adaptive optics (AO) wavefront sensors (WFS) because of the perspective subtended between the main and the launching telescopes. The LGS spots unveil the Mesopause Na vertical distribution and its variability impacts the WFS performance. To measure the absolute LGS height profile is important to get the total flux return and it can be obtained from an auxiliary telescope in a bistatic configuration. In 2015-2016, the 20W CW ESO Wendelstein LGS Unit (WLGSU) was installed in the Teide Observatory (OT) to carry out an experiment to maximize the photon flux return from the Na LGS. The experiment included the LGS profiling from the IAC80 telescope. Here we are presenting some preliminary results.
DOI: 10.26698/AO4ELT5.0183- Proceeding PDF
