TITLE: GCN CIRCULAR NUMBER: 6292 SUBJECT: IBAS Alert n.4199: Not a GRB DATE: 07/04/12 15:49:17 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF-Milano) and S.Shaw (ISDC, Versoix) on behalf of the IBAS Localization Team report: IBAS Alert n. 4199 is not due to a GRB. It has been caused by a known source. The attitude information was incorrect at the time of the trigger.