The 2016–2017 peak luminosity of the pre-main sequence variable V2492 Cygni T. Giannini, U. Munari, S. Antoniucci, D. Lorenzetti, A. A. Arkharov, S. Dallaporta, A. Rossi and G. Traven A&A, 611 (2018) A54 Published online: 23 March 2018 DOI: 10.1051/0004-6361/201731611