Temporal changes of the flare activity of Proxima Centauri Ya. V. Pavlenko, A. Suárez Mascareño, M. R. Zapatero Osorio, R. Rebolo, N. Lodieu, V. J. S. Béjar, J. I. González Hernández and M. Mohorian A&A, 626 (2019) A111 Published online: 20 June 2019 DOI: 10.1051/0004-6361/201834258