TITLE: GCN CIRCULAR NUMBER: 31181 SUBJECT: GRB 211206A: Not observable by Fermi-GBM DATE: 21/12/07 18:45:02 GMT FROM: Oliver J Roberts at USRA/NASA O.J. Roberts (USRA/NASA-MSFC) reports on behalf of the Fermi-GBM team: Fermi-GBM was passing through the South Atlantic Anomaly from 9.4 minutes prior to the trigger time of GRB 211206A (GCNs 31175,31176 and 31180), until 14.3 minutes after, over which time the GBM detectors were disabled.