TITLE: GCN CIRCULAR NUMBER: 6153 SUBJECT: IBAS Alert n. 4144: not a GRB DATE: 07/02/27 01:17:20 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF-Milano) and N.Mowlavi (ISDC- Versoix) on behalf of the IBAS Localization Team communicate IBAS Alert n. 4144 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.