Fermi Observations of GRB 090902B: A Distinct Spectral Component in the Prompt and Delayed Emission

GBM collaboration, LAT Collaboration, The Swift Team

We report on the observation of the bright, long gamma-ray burst, GRB 090902B, by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on-board the Fermi ob…