GCN Circular 31296
Subject
AGILE observations of a bright burst from SGR 1935+2154
Date
2021-12-24T13:48:27Z (2 years ago)
From
Alessandro Ursi at INAF/IAPS <alessandro.ursi@gmail.com>
A. Ursi (INAF/IAPS), C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), G.
Piano, E. Menegoni, L. Foffano (INAF/IAPS), V. Fioretti (INAF/OAS-Bologna),
M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo,
C. Casentini, Y. Evangelista, L. Pacciani (INAF/IAPS), F. Lucarelli (SSDC,
and INAF/OAR), A. Bulgarelli, F. Fuschino, N. Parmiggiani
(INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen University),
M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), F. Longo (Univ.
Trieste and INFN Trieste), A. Giuliani (INAF/IASF-Mi), report on behalf of
the AGILE Team:
The AGILE satellite clearly detected a bright burst from the SGR1935+2154,
at T0 = 2021-12-24 03:42:34 s (UTC), reported by Fermi GBM (Fermi GBM
Trigger bn211224155).
The burst is clearly visible in the AGILE scientific ratemeters of the
SuperAGILE (SA; 20-60 keV) and AntiCoincidence (AC; 50-200 keV) detectors.
The event lasted about 2 s and it released a total number of 360 counts in
the SA detector (above a background rate of 110 Hz), and 9250 counts in the
AC detector (above a background rate of 2960 Hz). The AGILE ratemeter light
curves can be found at
http://www.agilescienceapp.it/notices/SGR1935+2154_AGILE_RM.png . At T0,
the SGR1935+2154 was 46 deg off-axis for AGILE.
Additional analysis of AGILE data is in progress.
