A multi-wavelength view of magnetic flaring from PMS stars E. Flaccomio, G. Micela, S. Sciortino, A. M. Cody, M. G. Guarcello, M. Morales-Calderòn, L. Rebull and J. R. Stauffer A&A, 620 (2018) A55 Published online: 29 November 2018 DOI: 10.1051/0004-6361/201833308