TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4168 SUBJECT: SGR 1806-20: continued moderate activity seen with INTEGRAL DATE: 05/10/27 08:09:41 GMT FROM: Sandro Mereghetti at IASF/CNR S. Mereghetti (IASF-Milano), D. Gotz (SAP, Saclay), M. Beck (ISDC, Versoix), J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team, and I.F. Mirabel (ESO) on behalf of the INTEGRAL Science Working Team report: The soft gamma-ray repeater SGR 1806-20 continues to be in an active bursting state. A few normal short bursts have been detected by IBAS in October 2005 (note that SGR 1806-20 was not observed continuously during this period; the INTEGRAL observation log can be found at http://intweb.esac.esa.int/ ). Burst times, approximate durations, and fluences (15-100 keV) measured with the IBIS/ISGRI instrument are reported below: Date and UT Duration (s) Fluence (erg cm-2) 2005-10-01T07:47:10 0.1 3E-8 2005-10-04T02:54:14 0.1 2E-8 2005-10-22T03:43:40 0.1 4E-8 2005-10-22T07:25:37 0.38 9E-7 2005-10-22T08:52:42 0.07 2E-8 2005-10-25T04:48:31 0.11 2E-8 The burst at 2005-10-22T08:52:42 was followed by a fainter peak 4.4 s later, lasting 0.04 s. We remind that the occurrence of SGR 1806-20 bursts detected with high signal to noise ratio is reported in real time with IBAS Alert Packets. See http://ibas.mi.iasf.cnr.it/ for an uptated table of all the IBAS Alerts and for information on how to receive the Alert Packets for soft repeaters and type I bursters. This message can be cited.