TITLE: GCN CIRCULAR NUMBER: 4084 SUBJECT: IBAS Alert 2673: not a real GRB DATE: 05/10/11 06:54:14 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF Milano), N. Mowlavi (ISDC Versoix) on behalf of the IBAS Localization Team report: IBAS Alert n.2673 is not due to a real GRB, but to a known source.