TITLE: GCN CIRCULAR NUMBER: 5650 SUBJECT: IBAS Alert n.3501: not a GRB DATE: 06/09/29 08:56:24 GMT FROM: Sandro Mereghetti at IASF/CNR N.Mowlavi (ISDC, Geneva), S. Mereghetti (IASF, Milano) on behalf of the IBAS Localization Team report: IBAS alert No 3501 is not due to a GRB but to a known source