TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2550
SUBJECT: IBAS GRB alerts 1679, 1680, 1681
DATE:    04/03/19 08:30:55 GMT
FROM:    Diego Gotz at IASF-CNR  <diego@mi.iasf.cnr.it>

D. Gotz on behalf of the IBAS Localization Team reports:

IBAS Alerts n. 1679, 1680, 1681 are not caused by a GRB or an SGR. They
are due to a known source, but the attitude information was incorrect at
the time of the triggers, so they were not filtered out.