TITLE: GCN CIRCULAR NUMBER: 19546 SUBJECT: More FERMI GBM bursts from the magnetar SGR 1935+2154 DATE: 16/06/21 21:16:36 GMT FROM: George A. Younes at George Washington U G. Younes, C. Kouveliotou (GWU) report on behalf of the Fermi/GBM magnetar team: "SGR 1935+2154 has triggered FERMI/GBM twice in the past 24 hours on short bright events. The times of the triggers are as follows: Trigger number Trigger date Trigger time (UT) bn160620637 2016-06-20 15:16:34.88(*) bn160618852 2016-06-18 20:27:25.80 (*) GBM trigger simultaneous with MAXI/GSC detection (Negoro et al. 2016, GCN 19545) The source has been sporadically undergoing outbursts for the past two years (see, e.g., Cummmings 2014 GCN 16530, Kaneko et al. 2014 GCN 16577, Burrows et al. 2015 GCN 17485, Burns & Younes 2015 GCN 17496, Yu & Veres 2016 GCN 19434, Younes 2016 GCN 19437). Detailed analysis of the FERMI GBM triggered and untriggered bursts detected during all outburst episodes is underway and will be reported elsewhere." -- George A. Younes, PhD Postdoctoral Researcher The George Washington University Physics department 725 21st St NW, Washington, DC 20052