SGR J1935+2154 has been in an active phase since early October 2022. Since 2022-10-13 04:51:43 UT, Insight-HXMT has been observing SGR J1935+2154 under a public ToO. Using different time resolutions (5, 10, 20, and 40 ms), we searched the data of Insight-HXMT/HE, ME, and LE (1-10keV/LE,10-30keV/ME, and 30-250 keV/HE_NaI). Assuming that bursts were separated at least by 1 s, Insight-HXMT detected over 200 bursts during the first two-day observation. The light curves show these bursts are typical magnetar short bursts. A burst forest of more than 60 bursts was detected from 2022-10-14T16:53 to 2022-10-14T17:41, which has also been reported by NICER and Nustar in atel #15690.

We note that Insight-HXMT was pointed to SGR J1935+2154, but unfortunately blocked by the earth during the bright radio burst detected by CHIME (atel #15681) from SGR J1935+2154 and the associated bright X-ray burst detected by GECAM and HEBS (atel #15682) and Konus-Wind (atel #15686).

We caution that significant data saturation may exist and is not corrected in the standard Insight-HXMT data products, since Insight-HXMT was not designed to handle very high counting rates. We thus caution users of these data products be aware of these effects.

Below is the list of Insight-HXMT detected X-ray bursts;  This result is preliminary, and additional analysis of Insight-HXMT data is in progress. Insight-HXMT has been continuously observing SGR J1935+2154 since then. Any further information on Insight-HXMT observations on SGR J1935+2154 can be obtained by writing to Dr. C.K. Li (lick@ihep.ac.cn).

all times are arrival times at Insight-HXMT in UTC:

2022-10-13T04:56:16.690
2022-10-13T05:43:29.095
2022-10-13T05:55:43.880
2022-10-13T05:59:31.160
2022-10-13T06:02:16.160
2022-10-13T06:13:24.700
2022-10-13T06:21:00.830
2022-10-13T06:40:27.915
2022-10-13T07:17:27.270
2022-10-13T07:18:07.100
2022-10-13T07:25:46.565
2022-10-13T07:31:22.330
2022-10-13T07:33:26.660
2022-10-13T07:38:21.335
2022-10-13T07:47:49.575
2022-10-13T07:50:23.990
2022-10-13T07:52:44.840
2022-10-13T08:00:02.390
2022-10-13T08:00:36.400
2022-10-13T08:06:08.300
2022-10-13T08:17:11.665
2022-10-13T08:52:02.780
2022-10-13T09:14:22.295
2022-10-13T09:19:29.870
2022-10-13T09:23:44.040
2022-10-13T09:27:27.165
2022-10-13T10:31:43.060
2022-10-13T10:33:01.395
2022-10-13T10:40:45.320
2022-10-13T10:45:05.865
2022-10-13T10:46:10.540
2022-10-13T10:50:12.035
2022-10-13T10:55:12.840
2022-10-13T11:27:34.045
2022-10-13T12:08:04.040
2022-10-13T12:20:39.140
2022-10-13T12:33:55.420
2022-10-13T13:40:07.270
2022-10-13T13:42:58.930
2022-10-13T13:59:10.855
2022-10-13T14:18:48.800
2022-10-13T14:22:37.830
2022-10-13T14:39:43.540
2022-10-13T15:30:31.450
2022-10-13T15:30:32.720
2022-10-13T16:03:38.340
2022-10-13T16:04:04.180
2022-10-13T16:12:26.720
2022-10-13T16:46:50.000
2022-10-13T17:39:27.760
2022-10-13T18:19:25.765
2022-10-13T18:23:29.635
2022-10-13T18:38:04.715
2022-10-13T20:59:58.760
2022-10-13T22:35:54.260
2022-10-13T22:36:24.490
2022-10-13T23:33:05.660
2022-10-13T23:42:07.300
2022-10-14T01:04:10.110
2022-10-14T01:04:21.165
2022-10-14T01:28:48.045
2022-10-14T02:18:54.620
2022-10-14T02:20:33.520
2022-10-14T02:26:21.240
2022-10-14T02:27:47.140
2022-10-14T02:30:14.760
2022-10-14T02:35:51.055
2022-10-14T02:39:55.805
2022-10-14T02:40:09.510
2022-10-14T02:43:22.510
2022-10-14T02:45:56.410
2022-10-14T02:49:42.080
2022-10-14T02:52:16.430
2022-10-14T02:53:58.040
2022-10-14T02:55:47.155
2022-10-14T03:02:37.945
2022-10-14T03:02:57.420
2022-10-14T03:54:39.000
2022-10-14T03:56:01.460
2022-10-14T04:07:30.620
2022-10-14T04:14:07.490
2022-10-14T04:17:33.460
2022-10-14T04:22:29.020
2022-10-14T04:36:24.485
2022-10-14T04:37:34.920
2022-10-14T04:37:50.060
2022-10-14T04:40:26.310
2022-10-14T04:41:37.510
2022-10-14T04:47:08.185
2022-10-14T05:36:13.200
2022-10-14T05:41:49.790
2022-10-14T05:42:15.290
2022-10-14T05:42:45.010
2022-10-14T05:47:48.395
2022-10-14T05:47:52.510
2022-10-14T05:58:52.410
2022-10-14T06:02:20.240
2022-10-14T06:26:23.440
2022-10-14T06:27:23.550
2022-10-14T07:02:19.965
2022-10-14T07:02:54.720
2022-10-14T07:06:43.415
2022-10-14T07:12:28.715
2022-10-14T07:16:05.135
2022-10-14T07:24:42.070
2022-10-14T07:32:13.560
2022-10-14T07:33:33.810
2022-10-14T07:35:51.120
2022-10-14T07:47:51.455
2022-10-14T07:51:22.585
2022-10-14T07:53:08.470
2022-10-14T07:56:22.705
2022-10-14T07:57:14.830
2022-10-14T08:08:29.320
2022-10-14T08:41:23.700
2022-10-14T08:43:01.080
2022-10-14T08:45:37.360
2022-10-14T08:49:43.080
2022-10-14T08:51:08.440
2022-10-14T08:55:47.205
2022-10-14T09:03:09.035
2022-10-14T09:23:00.820
2022-10-14T09:30:28.660
2022-10-14T09:30:30.840
2022-10-14T09:37:33.540
2022-10-14T10:22:25.450
2022-10-14T10:26:25.120
2022-10-14T10:28:39.570
2022-10-14T10:29:54.310
2022-10-14T10:30:48.640
2022-10-14T10:39:41.680
2022-10-14T10:55:26.970
2022-10-14T11:09:38.200
2022-10-14T11:12:40.940
2022-10-14T11:18:54.900
2022-10-14T11:52:19.400
2022-10-14T11:58:40.190
2022-10-14T11:59:36.190
2022-10-14T11:59:54.940
2022-10-14T12:02:10.280
2022-10-14T12:03:37.760
2022-10-14T12:15:08.740
2022-10-14T12:15:13.660
2022-10-14T12:15:17.700
2022-10-14T12:15:18.830
2022-10-14T12:18:21.090
2022-10-14T12:19:34.320
2022-10-14T12:19:52.080
2022-10-14T12:30:41.175
2022-10-14T12:46:06.000
2022-10-14T12:47:44.035
2022-10-14T12:54:50.260
2022-10-14T13:30:13.840
2022-10-14T13:30:49.665
2022-10-14T13:30:52.485
2022-10-14T13:38:25.170
2022-10-14T13:39:32.820
2022-10-14T13:40:21.735
2022-10-14T13:54:10.955
2022-10-14T14:01:55.740
2022-10-14T14:02:35.420
2022-10-14T14:06:30.100
2022-10-14T14:12:13.105
2022-10-14T14:19:18.950
2022-10-14T14:22:17.550
2022-10-14T14:26:54.755
2022-10-14T14:29:01.980
2022-10-14T15:17:51.120
2022-10-14T16:53:43.055
2022-10-14T16:53:46.340
2022-10-14T16:54:25.560
2022-10-14T16:54:28.805
2022-10-14T16:54:32.660
2022-10-14T16:54:34.800
2022-10-14T16:54:53.790
2022-10-14T16:54:57.680
2022-10-14T16:55:06.690
2022-10-14T16:55:19.785
2022-10-14T16:55:26.945
2022-10-14T16:55:34.600
2022-10-14T16:55:43.000
2022-10-14T16:55:45.120
2022-10-14T16:55:46.870
2022-10-14T16:55:57.240
2022-10-14T16:56:08.920
2022-10-14T17:18:44.000
2022-10-14T17:19:34.795
2022-10-14T17:20:39.650
2022-10-14T17:20:51.120
2022-10-14T17:20:59.640
2022-10-14T17:21:06.520
2022-10-14T17:21:14.510
2022-10-14T17:21:17.500
2022-10-14T17:21:24.970
2022-10-14T17:21:26.515
2022-10-14T17:21:58.010
2022-10-14T17:22:06.225
2022-10-14T17:22:22.415
2022-10-14T17:22:39.120
2022-10-14T17:23:07.190
2022-10-14T17:23:18.065
2022-10-14T17:24:01.115
2022-10-14T17:24:06.765
2022-10-14T17:24:09.180
2022-10-14T17:24:10.585
2022-10-14T17:24:12.830
2022-10-14T17:24:23.340
2022-10-14T17:24:36.560
2022-10-14T17:24:40.650
2022-10-14T17:24:44.235
2022-10-14T17:24:47.845
2022-10-14T17:25:03.905
2022-10-14T17:25:14.515
2022-10-14T17:25:45.520
2022-10-14T17:25:47.555
2022-10-14T17:26:02.345
2022-10-14T17:26:06.235
2022-10-14T17:26:07.240
2022-10-14T17:26:09.015
2022-10-14T17:26:12.965
2022-10-14T17:26:21.325
2022-10-14T17:26:32.540
2022-10-14T17:26:37.090
2022-10-14T17:26:40.935
2022-10-14T17:26:51.455
2022-10-14T17:26:58.345
2022-10-14T17:27:10.660
2022-10-14T17:28:09.405
2022-10-14T17:29:08.335
2022-10-14T17:30:02.310
2022-10-14T17:33:27.230
2022-10-14T17:34:06.620
2022-10-14T17:35:01.640
2022-10-14T17:35:52.880
2022-10-14T17:36:51.000
2022-10-14T17:38:27.335
2022-10-14T17:40:40.940
2022-10-14T18:08:29.280
2022-10-14T18:22:43.025
2022-10-14T18:31:50.170
2022-10-14T19:08:22.130
2022-10-14T19:12:35.185
2022-10-14T20:47:35.220
2022-10-14T20:47:52.820
2022-10-14T20:48:47.250
2022-10-14T20:50:51.160
2022-10-15T02:09:05.310
2022-10-15T02:13:54.520

Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.