Fermi-GBM Observations of High Bursting Activity from SGR J1935+2154

ATel #15672; O. J. Roberts (USRA/NASA-MSFC), S. Dalessi (UAH) and C. Malacaria (ISSI)
on 12 Oct 2022; 20:29 UT
Credential Certification: Oliver Roberts (oliver.roberts@nasa.gov)

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Fermi-GBM has triggered on 16 bursts from the direction of SGR J1935+2154
since September 27th 2022. The list of SGR bursts at the time of writing
(including the most recent one) is:

Date and Time in UTC   Fermi MET (s)

2022-10-12T17:39:26.16   687289171
2022-10-12T17:00:47.29   687286852
2022-10-12T16:11:15.04   687283880
2022-10-12T16:00:48.84   687283253
2022-10-12T15:40:10.21   687282015
2022-10-12T15:29:48.48   687281393
2022-10-12T15:14:04.13   687280449
2022-10-12T14:22:46.99   687277371
2022-10-12T12:47:04.40   687271629
2022-10-11T14:11:36.80   687190301
2022-10-11T10:41:16.68   687177681
2022-10-05T21:50:15.79   686699420
2022-10-05T15:35:06.25   686676911
2022-10-02T11:33:41.08   686403226
2022-10-01T20:50:55.74   686350260
2022-09-27T20:51:09.08   686004674

Of these, the following have been misclassified as GRBs:

Date and Time in UTC    Fermi MET (s)

2022-10-12T15:40:10.21   687282015
2022-10-12T15:29:48.48   687281393
2022-10-12T15:14:04.13    687280449
2022-10-12T14:22:46.99   687277371
2022-10-12T12:47:04.40   687271629

There are many more bursts that did not trigger GBM in the data during this
time interval. We report a small burst forest around 2022-10-12T15:40:10.21 UTC.
We assume this to be the same burst forest episode as that reported by INTEGRAL
(S. Mereghetti et al., GCN #32706).

Bursting activity from this source is continuing.

We encourage multi-wavelength observations to follow-up this most recent activation.

For Fermi GBM data and info, please visit the official Fermi GBM Support Page:
https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/