GCN Circular 32796
Subject
AGILE detection of the 2022 October 17 burst from SGR J1935+2154 reported by Konus-Wind
Date
2022-10-18T20:30:10Z (2 years ago)
From
Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>
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) 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) 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 without a direct localization.
Moreover the burst recently reported by GRBAlpha (GCN #32794) 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.
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.
