TITLE: GCN CIRCULAR NUMBER: 28027 SUBJECT: Updated catalog of X-ray bursts of SGR J1935+2154 from Insight-HXMT observations DATE: 20/06/25 07:26:57 GMT FROM: Shaolin Xiong at IHEP C.-K. Li, C. Cai, S.-N. Zhang, S.-L. Xiong, X.-B. Li, M.-Y. Ge, S.-M. Jia, J.-Y. Nie, H.-S. Zhao, C.-Z. Liu, Y. Chen, X.-L. Cao, Y.-P. Xu, F.-J. Lu, L.-M. Song (IHEP), T.-P. Li (THU/IHEP), on behalf of the Insight-HXMT team: From 2020-04-28 07:14:51 to 2020-06-01 01:05:48 UTC, Insight/HXMT has been observing SGR J1935+2154 under a dedicated public ToO. In previous reports (GCN #27718, Atel #13729), a preliminary list of x-ray bursts has been reported. Here we update the basic information of this burst list, which can be found at: http://enghxmt.ihep.ac.cn/bfy/331.jhtml. In this updated and refined analysis, all data of HE, ME and LE of Insight-HXMT have been extensively searched for bursts with time scales from 5 ms to 1 s, followed by a careful screening of false positives. A total of 133 bursts has been yielded. The trigger time (i.e. the arrival time at Insight-HXMT, without correction to geocentric time), fluence and duration of these bursts are also included in this online catalog. Details about this analysis will be published in forthcoming papers. The sensitivities (3-sigma) of Insight-HXMT to short bursts were reported in GCN #27718 and Atel #13729. Time intervals that SGR J1935+2154 was effectively monitored by Insight-HXMT (i.e. excluding Earth blocking and detector turn-off during SAA passages) has also been updated and could be found at: http://enghxmt.ihep.ac.cn/dqjh/317.jhtml Requests for targeted searches for fainter bursts at specific times and/or for specific intervals may be sent to C.-K. Li (lick@ihep.ac.cn).