TITLE: GCN CIRCULAR NUMBER: 21936 SUBJECT: Fermi-GBM GRB misclassifications DATE: 17/09/27 19:08:38 GMT FROM: Suraj Poolakkil at UAH S.Poolakkil (UAH) and F. Berlato (MPE) report on behalf of the Fermi GBM Team: "The following Fermi Gamma-ray Burst Monitor (GBM) triggers, tentatively classified as GRBs, were in fact likely due to particle activity: 528208493 / 170927524 / 12:34:48.34 UT 528217663 / 170927630 / 15:07:38.04 UT "