tokens: Work performed by F.E., F.R.d.C. and V.P. was supported by NASA grants NNX13AF79G and NNX14AG03G. M.O. was supported by NASA grants NNX08AO83G at UC Berkeley and NNH16AC60I at Los Alamos National Laboratory (LANL). W.L. was supported by NASA HGI grant NNX16AF78G. L.G. was supported by an NSF Faculty Development Grant (AGS-1429512) to the University of Minnesota. Work performed by F.R.d.C. and W.L. is part of the team effort under the title of “Diagnosing heating mechanisms in solar flares through spectroscopic observations of flare ribbons” at the International Space Science Institute (ISSI). M.O. and F.E. are part of the ISSI team “Particle Acceleration in Solar Flares and Terrestrial Substorms.”
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