TITLE:   GCN CIRCULAR
NUMBER:  31515
SUBJECT: AGILE observations of a bright burst from SGR 1935+2154
DATE:    22/01/21 18:57:44 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>

A. Ursi (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), F.
Verrecchia, C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and
Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C. Casentini, Y.
Evangelista, E. Menegoni, L. Foffano, L. Pacciani, G. Piano, M. Romani
(INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti,
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), , A. Giuliani (INAF/IASF-Mi),
report on behalf of the AGILE Team:

The AGILE satellite clearly detected the bright burst from the
SGR1935+2154, at T0 = 2022-01-20 09:51:16 s (UTC), reported by Konus-Wind
(GCN #31513) and triangulated by IPN (GCN #31512).

The burst is clearly visible in the AGILE scientific ratemeters of the
SuperAGILE detector (SA; 20-60 keV) and in all the five panels of the
AntiCoincidence system (AC Top, 50-200 keV; AC Lat, 80-200 keV). The event
released a total number of 289 counts in the SA detector (above a
background rate of 115 Hz), and 5100 counts in the AC detector (above a
background rate of 3400 Hz). The AGILE ratemeter light curves can be found
at http://www.agilescienceapp.it/notices/SGR1935+2154_220120_AGILE_RM.png .
At T0, the SGR1935+2154 was 110 deg off-axis for AGILE.

Additional analysis of AGILE data is in progress.