SGR J1935+2154

J. Wood (NASA/MSFC)
reports on behalf of the Fermi-GBM Team:

"Fermi-GBM has triggered on 7 bursts from the direction of SGR J1935+2154
since November 8th 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)

2022-11-09T19:01:17.22   689713282
2022-11-09T17:46:18.39   689708783
2022-11-09T17:35:49.15   689708154
2022-11-09T17:05:04.71   689706309
2022-11-09T16:06:08.62   689702773
2022-11-09T14:33:10.12   689697195
2022-11-08T19:48:49.90   689629734

Of these, the following have been misclassified as GRBs:

Date and Time in UTC     Fermi MET (s)

2022-11-09T19:01:17.22   689713282
2022-11-09T17:46:18.39   689708783
2022-11-09T17:35:49.15   689708154
2022-11-09T17:05:04.71   689706309
2022-11-09T16:06:08.62   689702773
2022-11-09T14:33:10.12   689697195


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/���

��C. Casentini (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR),
A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata),
M. Pilia (INAF/OA-Cagliari), A. Argan, M. Cardillo, L. Foffano, Y.
Evangelista, E. Menegoni, G. Piano (INAF/IAPS), A. Bulgarelli, A. Di
Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F.
Lucarelli, C. Pittori (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M.
Marisaldi (INAF/OAS-Bologna, and Bergen University), A. Trois
(INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi),
F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta (TeleSpazio),
report on behalf of the AGILE Team:

The AGILE Anti-Coincidence system (AC Top, 50-200 keV; AC Lat3, 80-200 
keV),
has detected also a short X-ray burst coincident with the SGR J1935+2154
burst reported by VZLUSAT-2 (GCN #32797
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 ), as reported yesterday (GCN 
#32796
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 )
for the 2022 October 17 burst by Konus-Wind (GCN #32792
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 ).
The burst detected by VZLUSAT-2 occurred on October 12 at time
2022-10-12 23:26:41. We report the detection of AC Top and AC Lat3 with
the following parameters

ACTop: 2022-10-12 23:26:41 , Counts: 3549 cts/s , Bkg: 3080 Hz , 8.45 sigma
ACLAT3: 2022-10-12 23:26:41 , Counts: 3500 cts/s , Bkg: 2400 Hz , 21.50 
sigma

This burst was not included in the 33 bursts reported in GCN #32789
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because it occurred when the source was at off-axis angle slightly higher
than our threshold. We note that for this reason the burst is also detected
at higher significance on the AC Lat3.
Also this detection is a confirmation of the X-ray bursting activity 
reported
by AGILE AC Top (GCN #32796
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 ).

The AGILE AC ratemeters light curve including the October 12 burst can
be found at:
http://www.agilescienceapp.it/notices/sgr_burst_12_10_22.png
Additional analysis of AGILE data is in progress.

F. Verrecchia (SSDC, and INAF/OAR), C. Casentini (INAF/IAPS),
M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Ursi (INAF/IAPS),
M. Pilia (INAF/OA-Cagliari), A. Argan, M. Cardillo, L. Foffano, Y.
Evangelista, E. Menegoni, G. Piano (INAF/IAPS), A. Bulgarelli, A. Di Piano,
V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F. 
Lucarelli,
C. Pittori (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M. Marisaldi
(INAF/OAS-Bologna, and Bergen University), A. Trois (INAF/OA-Cagliari),
I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste
and INFN Trieste), and P. Tempesta (TeleSpazio), report on behalf of
the AGILE Team:

The AGILE Anti-Coincidence system (AC Top; 50-200 keV), has detected
a short X-ray burst coincident with the SGR J1935+2154 burst detected
by Konus-Wind (GCN #32792
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 ) on 2022 October 17, at time 11:14:43.010 UT.
AGILE has recently reported the detection of X-ray flaring activity with
AC Top (GCN #32789
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 ) at time intervals near those reported by INTEGRAL,
Fermi/GBM, Swift, NICER and Konus-Wind, having SGR J1935+2154 within
the AGILE FoV.
We report the AGILE AC Top detection of the burst on October 17 with
the following parameters:

2022-10-17 11:14:43 , Counts: 4548 cts/s , Bkg: 2790 Hz , 23.62 sigma

This detection is an important confirmation of the origin of the X-ray
flaring activity reported in GCN #32789
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  without a direct localization.
Moreover the burst recently reported by GRBAlpha (GCN #32794
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 ) at time
2022-10-14 07:12:27.8 UT (with 4s time resolution), occurs 7.2 s
before one of the 33 bursts reported in GCN #32789
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 .

The AGILE AC ratemeters light curve including the October 17 burst can
be found at:
http://www.agilescienceapp.it/notices/SGR221017_AGILE_RM.png
Additional analysis of AGILE data is in progress.

C. Casentini (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR),
M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), M. Pilia 
(INAF/OA-Cagliari), ���
A. Ursi, A. Argan, M. Cardillo, L. Foffano, Y. Evangelista, E. Menegoni,
G. Piano (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, G. 
Panebianco,
N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli, C. Pittori(SSDC, and 
INAF/OAR),
M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, and Bergen 
University),
A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani 
(INAF/IASF-Mi),
F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta (TeleSpazio),
report on behalf of the AGILE Team:

The AGILE Anti-Coincidence system (AC Top; 50-200 keV), is detecting short
X-ray flaring activity from October 12nd 2022, at times within the X-ray
burst forest reported by INTEGRAL (GCN #32706
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 ), Fermi/GBM (GCN #32708
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 ,
#32737
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 , ATel #15672), Swift (ATel #15667), and NICER (ATel #15674). The 
time
of the radio burst (2022-10-14 19:21:47) detected by CHIME/FRB (Atel 
#15681)
and the associated X-ray burst detected by GECAM and HEBS (Atel #15682)
and Konus-Wind (GCN #2770
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 ) falls within a SAA passage.
Moreover AGILE AC is also detecting activity related to the bursts reported
by Konus-Wind�� (GCN #32768
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 ) and Fermi/GBM (GCN #32764
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 ).
We selected significant AC Top events occurring when SGR J1935+2154 was 
within
the AGILE field-of-view at off-axis angles <= 70 degrees.
We report the following 33 X-ray bursts at times within 2hrs from the 
Swift,
Fermi/GBM, and Konus-Wind bursts:

������ Date (UT)���������������� Counts������ Significance
��2022-10-01 21:57:59�� 3970.43������ 11.69 sigma ; +1h�� from Fermi/GBM 
trigger
��2022-10-02 10:24:05�� 3944.53������ 13.33 sigma ; -1h�� from Fermi/GBM 
trigger
��2022-10-02 11:45:31�� 4022.77������ 14.72 sigma ; +12m from Fermi/GBM 
trigger
��2022-10-02 11:54:18�� 3899.73������ 12.54 sigma ; +21m from Fermi/GBM 
trigger
��2022-10-05 15:46:44�� 4367.29������ 18.83 sigma ; +11m from Fermi/GBM 
trigger
��2022-10-05 21:06:08�� 4031.74������ 15.32 sigma ; -44m from Fermi/GBM 
trigger
��2022-10-05 21:54:00�� 3747.75������ 10.27 sigma ; +4m�� from Fermi/GBM 
trigger
��2022-10-10 01:35:58�� 3902.83������ 14.00 sigma ; -4m�� from Swift trigger
��2022-10-10 09:05:40�� 3891.70������ 10.29 sigma ; -10m from Swift trigger
��2022-10-10 14:00:03�� 3886.20������ 10.44 sigma ; -12m from Swift trigger
��2022-10-10 20:53:32�� 3714.24������ 10.88 sigma ; -30m from Swift trigger
��2022-10-10 21:40:42�� 3786.05������ 12.17 sigma ; +12m from Swift trigger
��2022-10-10 23:19:25�� 3673.79������ 10.16 sigma ; +1h50m from Swift 
trigger
��2022-10-11 10:27:56�� 4061.66������ 14.66 sigma ; -14m from Fermi/GBM 
trigger
��2022-10-11 10:44:26�� 4156.55������ 16.33 sigma ; +3m�� from Fermi/GBM 
trigger
��2022-10-11 13:56:18�� 4089.80������ 11.43 sigma ; -15m from Fermi/GBM 
trigger
��2022-10-12 12:47:10�� 3771.73������ 7.33�� sigma ; +6s from Fermi/GBM 
trigger
��2022-10-12 14:23:18�� 3977.49������ 10.88 sigma ; +30s from Fermi/GBM 
trigger
��2022-10-12 14:44:45�� 4361.14������ 17.14 sigma ; +22m from Fermi/GBM 
trigger
��2022-10-12 15:51:41�� 3959.15������ 10.21 sigma ; +11m from Fermi/GBM 
trigger
��2022-10-12 16:21:38�� 4143.65������ 13.39 sigma ; +11m from Fermi/GBM 
trigger
��2022-10-12 17:08:20�� 4335.50������ 16.19 sigma ; +8m�� from Fermi/GBM 
trigger
��2022-10-13 22:47:40�� 3704.51���� 10.49 sigma ; +6m�� from trigger KW
��2022-10-14 06:55:27�� 3932.92���� 11.37 sigma ; -17m from trigger KW
��2022-10-14 07:12:35�� 3720.07���� 7.65�� sigma ; +6s from trigger KW, 
+7s from
trigger FERMI/GBM
��2022-10-14 07:24:52�� 3728.30���� 7.80�� sigma ; +10s from trigger 
FERMI/GBM
��2022-10-14 08:25:59�� 4016.67���� 12.83 sigma ; +1h13m from KW trigger
��2022-10-14 08:33:00�� 3890.61���� 10.63 sigma ; +1h21m from KW trigger
��2022-10-14 08:38:24�� 4502.51���� 21.31 sigma ; +1h26m from KW trigger
��2022-10-14 11:40:42�� 3782.95���� 7.32�� sigma ; -1'10s from Fermi/GBM 
trigger
��2022-10-14 13:20:48�� 3801.83���� 8.37�� sigma ; +17s from Fermi/GBM 
trigger
��2022-10-14 13:29:21�� 3917.88���� 10.39 sigma ; +9m���� from Fermi/GBM 
trigger
��2022-10-14 14:29:38�� 4317.47���� 17.32 sigma ; +25m�� from Fermi/GBM 
trigger

where the typical burst duration is one second (single bin).
An AGILE AC ratemeters light curve can be found at
https://tools.ssdc.asi.it/ImgView/Agile/AGILE-AC-RM_SGR_burst_14_10_2253
Additional analysis of AGILE data is in progress.

O.J. Roberts (USRA/NASA-MSFC), S. Dalessi (UAH) and C. Malacaria (ISSI)
report on behalf of the Fermi GBM Team:

���The Fermi Gamma-ray Burst Monitor (GBM) trigger 221012599/687277371
at 14:22:46.99 UT on 12 October 2022, tentatively classified as a GRB,
is in fact not due to a GRB. This trigger is due to SGR 1935+2154.

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
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 )

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/���

S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno,
E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC,
Versoix) and J.Borkowski (CAMK, Torun) report:

At least 30 short bursts in one hour from SGR J1935+2154 have been detected
in IBIS/ISGRI data starting from   14:22:47 of October 12.
Note that only the most significant events generate automatic alert
packets, but a quick look analysis shows many more bursts indicating that a
"burst forest" is currently ongoing.

Multiwavelength observations are encouraged.

 SGR J1935+2154 will be in the imaging field of view of INTEGRAL until
2022-10-13 00:58:26.

S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno,
E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC,
Versoix) and J.Borkowski (CAMK, Torun) report:

A burst from SGR J1935+2154 with duration 0.35 s and fluence of about 1e-8
erg/cm2  (20-200 keV) has been detected in the  IBIS/ISGRI data at 23:22:49
UT of 11 October 2022.

The burst was detected as a subthreshold event by IBAS and the
corresponding alert packet of type "WEAK" (n.10051)  distributed in real
time.

The bursts recently reported with INTEGRAL (Mereghetti et al. GCN 32675
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 )
and Swift/BAT  (Palmer et al. ATel 15667) indicate a reactivation of the
magnetar, which will be in the imaging field of view of INTEGRAL until
2022-10-13 00:58:26. Multiwavelength observations are encouraged.

S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno,
E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC,
Versoix) and J.Borkowski (CAMK, Torun) report:

A burst from SGR J1935+2154 has been detected by IBAS in the  IBIS/ISGRI
data at 21:28:25.8  UT of 10 October 2022. The corresponding alert packet
(n.10049) with the correct source identification was automatically
distributed in real time.

The burst had a duration of about 0.4 s and a fluence of about 3e-8 erg/cm2
 (20-200 keV).

A. Y. Lien (U Tampa), K. L. Page (U Leicester) and D. M. Palmer (LANL)
report on behalf of the Neil Gehrels Swift Observatory Team:

At 20:32:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located SGR J1935+2154 (trigger=1108538). 
The BAT on-board calculated location is 
RA, Dec 293.714, +21.901 which is 
   RA(J2000) = 19h 34m 51s
   Dec(J2000) = +21d 54' 04"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 0.3 sec.  The peak count rate
was ~110,000 counts/sec (on a 64 ms timescale, 15-350 keV), at
~0 sec after the trigger. 

An XRT and UVOT observation of SGR J1935+2154 is scheduled for 
21:50-22:18 UT (target ID 33349).    

This source was last seen to be active by BAT in a series of  
at least 36 bursts during the period Jan 9-18, 2022.

C. Zheng, J. C. Liu, Y. Q. Zhang, S. L. Xiong, C. Cai, S. Xiao, 
P. Zhang, C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song,
Y. Zhao, Z. W. Guo,  W. C. Xue, C. W. Wang, Q. B. Yi, 
B. X. Zhang,  W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, 
X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, 
J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, 
H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, 
X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, 
Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, 
C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang,
X. Zhou, F. J. Lu, S. N. Zhang (IHEP)
report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:
 
Trigger Time (UTC)
2022-01-20T18:52:48.950
2022-01-23T20:06:38.750
2022-01-24T02:10:55.050
2022-01-24T02:27:07.400

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

W. C. Xue, C. Cai, Y. Q. Zhang, S. L. Xiong, S. Xiao, P. Zhang, 
C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song,
J. C. Liu,  Y. Zhao, Z. W. Guo, C. Zheng, C. W. Wang, 
Q. B. Yi, B. X. Zhang,  W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, 
X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, 
J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, 
H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, 
X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, 
Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, 
C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang,
X. Zhou, F. J. Lu, S. N. Zhang (IHEP)
report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:
 
Trigger Time (UTC)
2022-01-14T19:42:08.050
2022-01-14T19:45:08.100
2022-01-14T19:56:52.700
2022-01-14T20:06:07.400
2022-01-14T20:07:03.050
2022-01-14T20:12:45.300
2022-01-14T20:15:54.400
2022-01-14T20:21:05.150
2022-01-14T20:23:35.400
2022-01-14T20:26:50.300
2022-01-14T20:29:07.250
2022-01-14T20:31:49.900
2022-01-15T09:26:39.900
2022-01-15T13:52:26.050
2022-01-15T16:31:14.900
2022-01-15T17:21:59.300
2022-01-16T10:48:37.650
2022-01-16T10:59:28.800

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

C. Cai, Y. Q. Zhang, S. L. Xiong, S. Xiao, P. Zhang, 
C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song,
J. C. Liu,  Y. Zhao, Z. W. Guo, C. Zheng, W. C. Xue, C. W. Wang, 
Q. B. Yi, B. X. Zhang,  W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, 
X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, 
J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, 
H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, 
X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, 
Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, 
C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang,
X. Zhou, F. J. Lu, S. N. Zhang (IHEP)
report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:
 
Trigger Time (UTC)
2022-01-12T17:57:08.500
2022-01-13T19:36:08.600
2022-01-13T20:14:58.600
2022-01-13T21:41:17.900

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

O.J. Roberts (USRA/NASA-MSFC) reports on behalf of the Fermi GBM Team:

���The Fermi Gamma-ray Burst Monitor (GBM) trigger 220112832/663710289
at 19:58:04.04 UT on 12 January 2022, tentatively classified as a GRB,
is in fact not due to a GRB. This trigger is due to SGR 1935+2154.

Fermi-GBM has triggered on 29 bursts from the direction of SGR J1935+2154
since December 24th 2021, some of which may have been misclassified as GRBs.

This list at the time of writing (including the most recent one) is:

Date and Time in UTC     Fermi MET (s)
2022-01-12T19:58:04.04  663710289
2022-01-12T08:39:25.34  663669570
2022-01-12T05:42:51.54  663658976
2022-01-12T04:31:20.07  663654685
2022-01-12T02:19:22.23  663646767
2022-01-12T02:05:58.27  663645963
2022-01-12T01:03:46.83  663642231
2022-01-11T21:54:01.18  663630846
2022-01-11T18:21:07.76  663618072
2022-01-11T17:05:55.66  663613560
2022-01-11T08:58:35.36  663584320
2022-01-11T07:48:21.49  663580106
2022-01-11T05:42:12.27  663572537
2022-01-10T15:55:38.32  663522943
2022-01-10T04:31:43.13  663481908
2022-01-10T02:57:16.80  663476241
2022-01-09T12:57:21.98  663425846
2022-01-09T09:28:12.79  663413297
2022-01-09T07:39:10.69  663406755
2022-01-09T04:57:16.14  663397041
2022-01-08T14:41:46.89  663345711
2022-01-06T02:36:14.05  663129379
2022-01-05T07:06:40.74  663059205
2022-01-05T06:01:31.43  663055296
2022-01-04T04:32:11.17  662963536
2021-12-29T16:41:26.20  662488891
2021-12-26T12:55:09.72  662216114
2021-12-25T22:22:20.14  662163745
2021-12-24T03:42:34.36  662010159

Fermi-GBM will not report on future triggers from this source during its current outbursting phase.

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/���

S. Xiao, Y. Zhao, Y. Q. Zhang, S. L. Xiong, C. Cai, P. Zhang, 
C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song,
J. C. Liu, Z. W. Guo, C. Zheng, W. C. Xue, C. W. Wang, 
Q. B. Yi, B. X. Zhang,  W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, 
X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, 
J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, 
H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, 
X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, 
Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, 
C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang,
X. Zhou, F. J. Lu, S. N. Zhang (IHEP)
report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:
 
Trigger Time (UTC)
2022-01-11T08:58:35.450
2022-01-12T01:03:46.900
2022-01-12T05:42:51.650
2022-01-12T08:39:25.450

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

Y. Zhao, Y. Q. Zhang, S. L. Xiong, C. Cai, S. Xiao, P. Zhang, 
C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song,
J. C. Liu, Z. W. Guo, C. Zheng, W. C. Xue, C. W. Wang, 
Q. B. Yi, B. X. Zhang,  W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, 
X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, 
J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, 
H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, 
X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, 
Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, 
C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang,
X. Zhou, F. J. Lu, S. N. Zhang (IHEP)
report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:
 
Trigger Time (UTC)
2022-01-08T14:41:46.900
2022-01-09T07:39:10.700
2022-01-10T06:52:40.500

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

Y. Q. Zhang, S. L. Xiong, C. Cai, S. Xiao, P. Zhang, 
C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song,
J. C. Liu,  Y. Zhao, Z. W. Guo, C. Zheng, W. C. Xue, C. W. Wang, 
Q. B. Yi, B. X. Zhang,  W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, 
X. Ma, L. M. Song, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, 
J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, 
H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, 
X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, 
Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, 
C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang,
X. Zhou, F. J. Lu, S. N. Zhang (IHEP)
report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:
 
Trigger Time (UTC)
2022-01-04T04:32:11.200
2022-01-05T06:01:31.450
2022-01-05T07:06:40.800

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

C. W. Wang, S. L. Xiong, Y. Huang, C. Cai, C. Y. Li, X. B. Li,
J. C. Liu, X. Y. Song,  P. Wang, S. L. Xie, S. Xiao, Z. W. Guo, W. C. Xue, 
Q. B. Yi, Y. Q. Zhang, G. Y. Zhao, X. Y. Zhao, Y. Zhao, C. Zheng, W. Chen,
Y. Q. Du, D. Y. Guo, J. J. He, J. Liang, F. J. Lu, Q. Luo, X. Ma,
W. X. Peng, R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang, 
X. L. Zhang, Z. Zhang, S. J. Zheng (IHEP), report on behalf of GECAM team:

GECAM-B detected a series of bursts very probably from SGR J1935+2154
either by in-flight trigger or by on-ground search of the data, from
2021-09-15T14 to 2021-09-23T14(UTC).
Here is the list of these bursts:

Trigger Time (UTC)
2021-09-15T15:32:56.050
2021-09-17T12:52:37.800
2021-09-17T13:58:25.100
2021-09-18T22:58:52.150
2021-09-22T02:39:10.200
2021-09-22T20:12:16.500

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary.

C. Y. Li, C. Cai, S. L. Xiong, Y. Huang, W. C. Xue, Z. W. Guo, X. B. Li,
J. C. Liu, X. Y. Song, C. W. Wang, P. Wang, S. L. Xie, S. Xiao,
Q. B. Yi, Y. Q. Zhang, G. Y. Zhao, X. Y. Zhao, Y. Zhao, C. Zheng, W. Chen,
Y. Q. Du, D. Y. Guo, J. J. He, J. Liang, F. J. Lu, Q. Luo, X. Ma,
W. X. Peng, R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang, 
X. L. Zhang, Z. Zhang, S. J. Zheng (IHEP), report on behalf of GECAM team:

GECAM-B detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data, from
2021-09-13T01 to 2021-09-15T14 (UTC). Here is the list of these bursts:

Trigger Time (UTC)
2021-09-13T14:12:39.650
2021-09-13T19:51:32.950
2021-09-14T11:10:36.250
2021-09-14T14:15:42.900
2021-09-14T23:21:58.500
2021-09-14T23:26:34.050
2021-09-15T02:35:47.350
2021-09-15T02:39:25.700

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary.

C. Cai, S. L. Xiong, Y. Huang, W. C. Xue, Z. W. Guo, C. Y. Li, X. B. Li,
J. C. Liu, X. Y. Song, C. W. Wang, P. Wang, S. L. Xie, S. Xiao,
Q. B. Yi, Y. Q. Zhang, G. Y. Zhao, X. Y. Zhao, Yi Zhao, C. Zheng, W. Chen,
Y. Q. Du, D. Y. Guo, J. J. He, J. Liang, F. J. Lu, Q. Luo, X. Ma,
W. X. Peng, R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang, 
X. L. Zhang, Z. Zhang, S. J. Zheng (IHEP), report on behalf of GECAM team:

GECAM-B detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data, from
2021-09-12T05 to 2021-09-13T01. Here is the list of these bursts:

Trigger Time (UTC)
2021-09-12T05:44:17.050
2021-09-12T16:26:08.150
2021-09-12T16:52:07.950
2021-09-12T22:16:36.200
2021-09-13T00:27:25.200

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary.

W. C. Xue, S. L. Xiong, C. Cai, Y. Huang, Z. W. Guo, C. Y. Li, X. B. Li,
J. C. Liu, X. Y. Song, C. W. Wang, P. Wang, S. L. Xie, S. Xiao,
Q. B. Yi, Y. Q. Zhang, G. Y. Zhao, X. Y. Zhao, Y. Zhao, C. Zheng, W. Chen,
Y. Q. Du, D. Y. Guo, J. J. He, J. Liang, F. J. Lu, Q. Luo, X. Ma,
W. X. Peng, R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang, 
X. L. Zhang, Z. Zhang, S. J. Zheng (IHEP), report on behalf of GECAM team:

GECAM-B detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data, from
2021-09-11T07 to 2021-09-12T08. Here is the list of these bursts:

Trigger Time (UTC)
2021-09-11T07:15:04.000
2021-09-11T16:35:46.500
2021-09-11T16:36:57.900
2021-09-11T16:38:01.050
2021-09-11T16:39:21.000
2021-09-11T16:50:03.850
2021-09-11T17:00:41.900
2021-09-11T17:01:09.800
2021-09-11T17:01:59.550
2021-09-11T17:04:29.800
2021-09-11T17:10:48.750
2021-09-11T18:02:13.500
2021-09-11T18:04:46.350
2021-09-11T18:54:36.050
2021-09-11T19:43:29.000
2021-09-11T19:46:50.050
2021-09-11T20:13:40.550
2021-09-11T20:22:59.050
2021-09-11T20:33:14.550
2021-09-11T21:07:28.350
2021-09-11T22:51:41.600
2021-09-12T00:34:37.450
2021-09-12T00:45:49.400
2021-09-12T05:14:07.950
2021-09-12T06:51:13.700
2021-09-12T07:28:07.500

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary.

S. Xiao, S. L. Xiong, C. Cai, Y. Huang, Z. W. Guo, C. Y. Li, X. B. Li,
J. C. Liu, X. Y. Song, C. W. Wang, P. Wang, S. L. Xie, W. C. Xue,
Q. B. Yi, Y. Q. Zhang, G. Y. Zhao, X. Y. Zhao, Yi Zhao, C. Zheng, W. Chen,
Y. Q. Du, D. Y. Guo, J. J. He, J. Liang, F. J. Lu, Q. Luo, X. Ma,
W. X. Peng, R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang, 
X. L. Zhang, Z. Zhang, S. J. Zheng (IHEP), report on behalf of GECAM team:

GECAM-B has detected a series of bursts very probably from SGR J1935+2154,
either by in-flight trigger or by on-ground search of the data.
Here is the list of these bursts:

Trigger Time (UTC)
2021-09-09T20:58:35.600
2021-09-09T21:07:12.100
2021-09-10T01:04:33.500
2021-09-10T02:07:56.700
2021-09-10T02:08:28.800
2021-09-10T03:22:40.550
2021-09-10T03:24:47.150
2021-09-10T03:42:45.750
2021-09-10T05:05:03.350
2021-09-10T05:35:55.500

Locations of all these bursts are consistent with SGR J1935+2154.

Please note that all GECAM results here are preliminary.

S. Xiao, S. L. Xiong, Y. Zhao, X. Y. Zhao, Y. Huang, X. Y. Song, C. Cai,
S. L. Xie, Y. Q. Zhang, Z. W. Guo, J. C. Liu, C. Zheng, W. C. Xue, C. Y. Li,
C. W. Wang, Q. B. Yi, B. X. Zhang, P. Zhang, W. X. Peng, R. Qiao, D. Y. Guo,
X. B. Li, X. Ma, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, J. J. He, 
G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang,
L. M. Song, F. J. Lu, S. N. Zhang (IHEP), report on behalf of GECAM team:

During the commissioning phase, GECAM-B was triggered in-flight by
a bright short burst (trig# 84938908) at 2021-09-10T02:08:28.800 UTC (T0),
Its alert data was promptly downlinked to the ground through the short
message service of BeiDou Navigation Satellite System (BDS). The time latency
of the first BeiDou message relative to the trigger time is about 1 minute.

According to the GECAM-B light curves in about 15-65 keV, this burst mainly
consists of a single pulse with a duration about 100 ms. The location is consistent
with SGR J1935+2154 within the error.

The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/utn210910_020828_GECAMb.png

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

S. Xiao,  S. L. Xiong, Y. Zhao, X. Y. Zhao, Y. Huang, X. Y. Song, C. Cai,
S. L. Xie, Y. Q. Zhang, Z. W. Guo, J. C. Liu, C. Zheng, W. C. Xue, C. Y. Li,
C. W. Wang, Q. B. Yi, B. X. Zhang, P. Zhang, W. X. Peng, R. Qiao, D. Y. Guo,
X. B. Li, X. Ma, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, J. J. He, 
G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang,
L. M. Song, F. J. Lu, S. N. Zhang (IHEP), report on behalf of GECAM team:

During the commissioning phase, GECAM-B was triggered in-flight by
a bright short burst (trig# 84920832) at 2021-09-09T21:07:12.150 UTC (T0),
Its alert data was promptly downlinked to the ground through the short
message service of BeiDou Navigation Satellite System (BDS). The time latency
of the first BeiDou message relative to the trigger time is about 1 minute.

According to the GECAM-B light curves in about 15-65 keV, this burst mainly
consists of a single pulse with a duration about 100 ms. The location is consistent
with SGR J1935+2154 within the error.

The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/utn210909_210712_GECAMb.png

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

C. Y. Li, W. C. Xue, S. Xiao, S. L. Xiong, X. Y. Zhao, X. Y. Song, C. Cai, Y. Huang,
S. L. Xie, J. C. Liu, Y. Q. Zhang,  Y. Zhao, Z. W. Guo, C. Zheng,
Z. H. An, C. Chen, G. Chen, W. Chen, M. Gao, K. Gong, D. Y. Guo, J. J. He,
B. Li, C. Li, J. H. Li, Q. X. Li, X. B. Li, X. Q. Li, Y. G. Li, X. H. Liang,
J. Y. Liao, J. C. Liu, X. J. Liu, Y. Q. Liu, F. J. Lu, Q. Luo, X. Ma,
G. Ou, W. X. Peng, R. Qiao, D. L. Shi, J. Y. Shi, L. M. Song,
G. X. Sun, X. L. Sun, Y. L. Tuo, C. W. Wang, J. Z. Wang,
P. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, M. Yao, Q. B. Yi,
B. X. Zhang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, H. M. Zhang,
K. Zhang, P. Zhang, S. N. Zhang, Z. Zhang, S. Y. Zhao, S. J. Zheng,
X. Zhou (IHEP), report on behalf of GECAM team:

During the commissioning phase, GECAM-B was triggered in-flight by
a bright short burst (trig# 79827178) at 2021-07-12T22:12:58.100 UTC (T0),
Its alert data was promptly downlinked to the ground through the short
message service of BeiDou Navigation Satellite System (BDS). The time latency
of the first BeiDou message relative to the trigger time is about 1 minute.

According to the GECAM-B light curves in about 20-100 keV, this burst mainly
consists of a single pulse with a duration about 50 ms. The location is consistent
with SGR J1935+2154 within the error.

The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/79827178.1energys.png

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

C. Y. Li, W. C. Xue, S. Xiao, S. L. Xiong, X. Y. Zhao, X. Y. Song, C. Cai, Y. Huang,
S. L. Xie, J. C. Liu, Y. Q. Zhang,  Y. Zhao, Z. W. Guo, C. Zheng,
Z. H. An, C. Chen, G. Chen, W. Chen, M. Gao, K. Gong, D. Y. Guo, J. J. He,
B. Li, C. Li, J. H. Li, Q. X. Li, X. B. Li, X. Q. Li, Y. G. Li, X. H. Liang,
J. Y. Liao, J. C. Liu, X. J. Liu, Y. Q. Liu, F. J. Lu, Q. Luo, X. Ma,
G. Ou, W. X. Peng, R. Qiao, D. L. Shi, J. Y. Shi, L. M. Song,
G. X. Sun, X. L. Sun, Y. L. Tuo, C. W. Wang, J. Z. Wang,
P. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, M. Yao, Q. B. Yi,
B. X. Zhang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, H. M. Zhang,
K. Zhang, P. Zhang, S. N. Zhang, Z. Zhang, S. Y. Zhao, S. J. Zheng,
X. Zhou (IHEP), report on behalf of GECAM team:

During the commissioning phase, GECAM-B was triggered in-flight by
a bright short burst (trig# 79763559) at 2021-07-12T04:32:39.600 UTC (T0),
Its alert data was promptly downlinked to the ground through the short
message service of BeiDou Navigation Satellite System (BDS). The time latency
of the first BeiDou message relative to the trigger time is about 1 minute.

According to the GECAM-B light curves in about 20-100 keV, this burst mainly
consists of a single pulse with a duration about 50 ms. The location is consistent
with SGR J1935+2154 within the error.

The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/79763559.600energys.pdf

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

W. C. Xue, S. Xiao, S. L. Xiong, X. Y. Zhao, X. Y. Song, C. Cai, Y. Huang,
S. L. Xie, J. C. Liu, C. Y. Li, Y. Q. Zhang,  Y. Zhao, Z. W. Guo, C. Zheng,
Z. H. An, C. Chen, G. Chen, W. Chen, M. Gao, K. Gong, D. Y. Guo, J. J. He,
B. Li, C. Li, J. H. Li, Q. X. Li, X. B. Li, X. Q. Li, Y. G. Li, X. H. Liang,
J. Y. Liao, J. C. Liu, X. J. Liu, Y. Q. Liu, F. J. Lu, Q. Luo, X. Ma,
G. Ou, W. X. Peng, R. Qiao, D. L. Shi, J. Y. Shi, L. M. Song,
G. X. Sun, X. L. Sun, Y. L. Tuo, C. W. Wang, J. Z. Wang,
P. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, M. Yao, Q. B. Yi,
B. X. Zhang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, H. M. Zhang,
K. Zhang, P. Zhang, S. N. Zhang, Z. Zhang, S. Y. Zhao, S. J. Zheng,
X. Zhou (IHEP), report on behalf of GECAM team:

During the commissioning phase, GECAM-B was triggered in-flight by
a bright short burst (trig# 79592741) at 2021-07-10T05:05:41.450 UTC (T0),
Its alert data was promptly downlinked to the ground through the short
message service of BeiDou Navigation Satellite System (BDS). The time latency
of the first BeiDou message relative to the trigger time is about 1 minute.

According to the GECAM-B light curves in about 20-50 keV, this burst mainly
consists of a single pulse with a duration about 50 ms. The position is consistent
with SGR J1935+2154 within the error.

The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/79592741.45000005energys.pdf

Please note that all GECAM results here are preliminary. The final analysis
will be published in journal papers or GECAM online catalog.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in
Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time),
which was funded by the Chinese Academy of Sciences (CAS).

R. Hamburg (UAH), C. Malacaria (USRA), and C. Fletcher (USRA)
report on behalf of the Fermi GBM Team:

"At 00:33:31.67 UT on 7 July 2021, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located a burst from SGR 1935+2154 (trigger 647310816
/210707023). Bursts from SGR 1935+2154 have been recently reported
by Integral/IBAS (Mereghetti et al. 2021, GCN 30395
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 ), GECAM-B
(Xiao et al. 2021, GCN 30400
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 ), and Swift/BAT (Palmer et al. 2021, GCN
30406
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 ).
The GBM on-ground location is consistent with the known position of the SGR.

The burst has a duration (T90) of about 0.1 seconds and is best fit
by a power law function with an exponential high-energy cutoff.
The power law index is 0.54 +/- 0.07 and the cutoff energy,
parameterized as Epeak, is 36.1 +/- 0.3 keV.
The event fluence (10-1000 keV) from T0-0.064 to T0+0.128 is
(2.52 +/- 0.03)E-06 erg/cm^2, and the average photon flux
(10-1000 keV) over this time period is 289 +/- 3 ph/s/cm^2.

Fermi GBM also triggered on two other bursts from SGR 1935+2154.
The first occurred on 6 July 2021 at 03:50:09.75 UT
(trigger 647236214 / 210706160) and the second on 7 July 2021
at 15:45:11.08 UT (trigger 647365516 / 210707656).

Additionally, an automated, blind search for short gamma-ray bursts
below the onboard triggering threshold in Fermi-GBM identified a
potential burst from SGR 1935+2154. This event (trigger 647276517)
occurred on 6 July 2021 at 15:01:52.68 UT. It is approximately
0.1 s in duration and displays emission between 30-300 keV.
The burst localization is broadly consistent with the SGR position.

The spectral analysis results presented above are preliminary.
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/"

E. Bissaldi (Politecnico and INFN Bari)
reports on behalf of the Fermi GBM Team:


"At 12:54:27.00 UT on 2 February 2021, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located a burst from SGR J1935+2154 (trigger 633963272/210202538).
The same burst was also reported by INTEGRAL (Ricciarini et al. 2021, GCN 29383
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 ).

The GBM on-ground location is consistent with the known position of the SGR.

The angle from the Fermi LAT boresight at the GBM trigger time is 90 degrees.

The burst has a duration (T90) of about 0.1 seconds
in the energy range 10-200 keV.

The time-averaged spectrum from T0-0.048 s to T0+0.96 s is
adequately fit by a power law function with an exponential
high-energy cutoff.  The power law index is 0.28 +/- 0.13 and
the cutoff energy, parameterized as Epeak, is 34.1 +/- 0.6 keV.

The event fluence (10-1000 keV) in this time interval is
(8.25 +/- 0.14)E-07 erg/cm^2.
The 64-ms peak photon flux measured starting from T0
in the 10-1000 keV band is 152 +/- 5 ph/s/cm^2.

The spectral analysis results presented above are preliminary.

GBM will continue to monitor the source and issue GCNs for bright bursts
from SGR J1935+2154 that have been observed by other instruments
with improved localizing capabilities, and for SGR bursts
initially misclassified as GRBs.


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

O.J. Roberts (USRA), J. Wood (USRA), A. von Kienlin (MPE), P. Veres (UAH)
and G. Younes (GWU) report on behalf of the Fermi GBM Team:

"At 15:23:29.92 UT on January 29th 2020, the Fermi Gamma-Ray Burst 
Monitor (GBM) triggered and located a burst from SGR 1935+2154 
(trigger 633626614 / 210129641). SGR J1935 bursts have also been reported 
by Konus-Wind (Ridnaia et al., GCN 29373
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 ), GECAM (Y. Huang et al., GCN 29363
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 ) 
and Swift-BAT (Ridania et al., GCN 29365
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 ).

The GBM on-ground location is consistent with the known position of the SGR.

The burst has a duration (T90) of about 0.1 seconds. There are two additional bursts
that also appear to be from SGR J1935, about 354s after the trigger time.

It is adequately fit by a power law function with an exponential high-energy cutoff. 
The power law index is 0.2 (+0.2/-0.2) and the cutoff energy, parameterized as 
Epeak, is 32.9 (+0.6/-0.6) keV.

The event fluence (10-1000 keV) from T0-0.064s to T0+0.064s 
is (5.2 +/- 0.1)E-7 erg/cm^2. The average photon flux in the 10-1000 keV band during 
this period is 94.6 +/- 1.9 ph/s/cm^2.

The spectrum is also well fit using a double blackbody (BB+BB) fit, with low and high 
temperatures of 6.2 (+0.6/-0.7) and 12.5 (+1.6/-1.3) keV, respectively.

Fermi GBM also subsequently triggered on multiple bursts from SGR J1935+2154 on 
January 24th, 28th and today, with a fraction of these being misclassified as GRBs. 
These triggers are:

January 29th:
210129886 / 633647760    (21:15:55.98 UTC)
210129441 / 633609344    (10:35:39.94 UTC)
210129116 / 633581187    (02:46:22.58 UTC)

January 28th
210128983 / 633569707    (23:35:02.48 UTC)

January 24th
210124867 / 633214108    (20:48:24.00 UTC)
210124325 / 633167319    (07:48:34.36 UTC)

The spectral analysis results presented above are preliminary.

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

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
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 , 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
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  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).

S.-N. Zhang, X.-B. Li, C.-K. Li, M.-Y. Ge, S.-L. Xiong,
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:

Since 2020-04-28 07:14:51 UTC, Insight/HXMT has been observing
SGR J1935+2154 under a public ToO. The current plan is to
continue this public ToO until the end of May. An extended observation
after May is probable if this SGR is still in active phase.

Joint observations with Insight-HXMT are highly encouraged.
The observation plan of Insight-HXMT can be found at:
http://enghxmt.ihep.ac.cn/dqjh.jhtml

Insight/HXMT data of this public ToO will be released very soon
(i.e. a few days after observation), following to the data policy of
Insight-HXMT. The data can be accessed at: http://hsuc.ihep.ac.cn/web

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 are developing specific
methods and codes to handle such data saturation, which have been applied
successfully to the burst of SGR J1935+2154 associated with FRB 200428
(Atel #13687). However, these codes are not yet mature enough for public
release. We thus suggest users of these data products be aware of these
effects. For assistance on accessing and analyzing the Insight-HXMT data,
please contact Dr. X.-B. Li at lixb@ihep.ac.cn

As of May 10, 2020, about 100 bursts from SGR J1935+2154 have been
found in a preliminary search of the raw data of HE, ME and LE.
The online catalogue of SGR J1935+2154 bursts detected by Insight-HXMT
could be found at: http://enghxmt.ihep.ac.cn/bfy/331.jhtml

The sensitivities (3-sigma) of Insight-HXMT to short bursts are:
HE (20 - 250 keV):�� Fluence = 4.5E-9 * sqrt(T)�� erg/cm2,
ME ( 5 - 30�� keV):�� Fluence = 3.5E-9 * sqrt(T)�� erg/cm2,
LE ( 1 - 10�� keV):�� Fluence = 2.7E-9 * sqrt(T)�� erg/cm2,
where T is the burst duration in second.

Niino, Y., Morokuma, T., Sako, S., Ohsawa, R., Beniyama, J (U. of Tokyo), 
Kokubo, M (Tohoku U), 
on behalf of the Tomo-e Gozen collaboration

We performed monitoring observations of SGR J1935+2154, from which intense burst activities have been found in the last few days (GCN #27657
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 , #27659
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 , #27661
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 , #27663
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 , #27664
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 , #27665
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 , #27667
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 , #27668
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 , #27669
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 , #27675
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 , ATel #13675, #13678, #13679, #13681, #13682, #13684, #13685, #13686, #13687, #13688, #13692, #13693, #13697), for 7 hrs (3.5 hrs starting UTC 2020-04-30 15:28 + 3.5 hrs starting UTC 2020-05-01 15:28) using the Tomo-e Gozen camera (optical CMOS imager, Sako et al. 2018, SPIE, 10702, 107020J) mounted on the 105-cm Kiso Schmidt telescope. 

The observations were conducted in a high-speed imaging mode with a frame rate of 24.4 fps (time resolution ~ 0.041 sec) and a 4.8x8 arcmin^2 FoV. Our quicklook analysis which degrades S/N of images by a factor of  ~ 10 shows no apparent optical bursts above a 5-sigma limit of ~ 1 Jy ms.

S.Mereghetti (IASF-Milano) report:

The position of the event reported in GCN 18711
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  is consistent with that of 
the known Soft Gamma-ray Repeater SGR J1935+2154 (GCN 16522
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 ).
Due to an error in the  software, this positional coincidence 
was not recognized and properly flagged in the alert packet n.7313

I apologize for the confusion.