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GCN Circular 32801

Subject
AGILE detection of a burst from SGR J1935+2154 reported by VZLUSAT-2
Date
2022-10-19T11:47:41Z (a year ago)
From
Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>
��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), as reported yesterday (GCN 
#32796)
for the 2022 October 17 burst by Konus-Wind (GCN #32792).
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
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).

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.
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