ARGOS at the LBT - Binocular laser guided ground-layer adaptive optics S. Rabien, R. Angel, L. Barl, U. Beckmann, L. Busoni, S. Belli, M. Bonaglia, J. Borelli, J. Brynnel, P. Buschkamp et al. (41 more) A&A, 621 (2019) A4 Published online: 19 December 2018 DOI: 10.1051/0004-6361/201833716