Flare activity and photospheric analysis of Proxima Centauri Y. Pavlenko, A. Suárez Mascareño, R. Rebolo, N. Lodieu, V. J. S. Béjar and J. I. González Hernández A&A, 606 (2017) A49 Published online: 09 October 2017 DOI: 10.1051/0004-6361/201730733