Fermi Observations of High Energy Emission from GRB 190114C

Synchrotron radiation from shock accelerated electrons has been well established as the source of the broadband afterglow emission accompanying gamma-ray bursts (GRBs). The relativistic electrons producing this emission are expected to also produce synchrotron self-compton (SSC) emission, yet no convincing evidence has ever been found for such an emission component. Late-time detections at GeV energies by the Fermi Large Area Telescocpe (LAT) have been shown to be consistent with the high energy extension of afterglow emission, without the need for SSC to explain most LAT detections. The detection of very high energy emission in GRB 190114C by Fermi LAT and MAGIC is now the first conclusive detection of this elusive emission component and may shed further light on the physics of GRB afterglows. We will review the Fermi Gamma-ray Burst Monitor (GBM) and LAT observations of GRB 190114C and discuss their implications for relativistic shock physics, future very high energy observatories, and possible constraints on the extra-galactic background light.