Prompt energization of relativistic and highly relativistic electrons during a substorm interval: Van Allen Probes observations

J. C. Foster, P. J. Erickson, D. N. Baker, S. G. Claudepierre, C. A. Kletzing, W. Kurth, G. D. Reeves, S. A. Thaller, H. E. Spence, Y. Y. Shprits, J. R. Wygant