GCN Circular 32789
Subject
AGILE detection of short X-ray flaring activity contemporary to SGR J1935+2154 reported bursts
Event
Date
2022-10-18T12:18:39Z (3 years ago)
From
Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>
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), Fermi/GBM (GCN #32708,
#32737, 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) falls within a SAA passage.
Moreover AGILE AC is also detecting activity related to the bursts reported
by Konus-Wind�� (GCN #32768) and Fermi/GBM (GCN #32764).
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.