TITLE: GCN CIRCULAR NUMBER: 8278 SUBJECT: GRB 080916C: Fermi GBM Spectral Analysis DATE: 08/09/20 23:41:31 GMT FROM: Alexander van der Horst at NASA/MSFC Alexander van der Horst (NASA/ORAU) and Adam Goldstein (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "We have performed spectral analysis of GRB 080916C (GCN 8245, 8246). The time averaged spectrum, from 8 keV up to 30 MeV, of the main emission up to 66 seconds after the burst is best fit by a Band function with Epeak = 424 +/- 24 keV, alpha = -0.91 +/- 0.02, and beta = -2.08 +/- 0.06. The fluence (8 keV - 30 MeV) is 1.9e-4 erg/cm^2. These spectral analysis results are preliminary; the final results will be published in the GBM GRB Catalog."