tokens: The Fermi -LAT Collaboration acknowledges support from a number of agencies and institutes for both development and the operation of the LAT as well as scientific data analysis. These include NASA and DOE in the United States, CEA/Irfu and IN2P3/CNRS in France, ASI and INFN in Italy, MEXT, KEK, and JAXA in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council, and the National Space Board in Sweden. Additional support from INAF in Italy and CNES in France for science analysis during the operations phase is also gratefully acknowledged. W.L. was supported by NASA HGI grant NNX16AF78G and LWS grant NNX14AJ49G. V.P., W.L., and F.R.d.C. are supported by NASA grants NNX14AG03G, NNX13AF79G, and NNX12AO70G. V.P. and L.K. are grateful for RFBR grant 15-02-03717. We thank Nariaka Nitta and Meng Jin for friutful discussions on SEPs and magnetic connectivity.
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