GCN Circular 33296

C. Casentini (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), F. Longo
(Uni. Trieste, INFN Trieste), M. Tavani (INAF/IAPS, and Univ. Roma Tor
Vergata),
C. Pittori,  F. Lucarelli (SSDC, and INAF/OAR), A. Argan, M. Cardillo, Y.
Evangelista,
L. Foffano, E. Menegoni, G. Piano (INAF/IAPS), A. Addis, L. Baroncelli, A.
Bulgarelli,
A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna),
M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, Bergen
University),
M. Pilia, A. Trois (INAF/OA Cagliari), I. Donnarumma, A.Ursi (ASI), A.
Giuliani
(INAF/IASF-Mi) and P. Tempesta (TeleSpazio), report on behalf of the AGILE
Team:

The AGILE satellite detected the long GRB 220307B at
T0 = 2023-02-07 04:40:48 s (UTC) (CALET trig. 1359779945).

The burst is clearly visible in the AGILE scientific ratemeters of the
MiniCALorimeter (MCAL; 0.4-100 MeV) and in all the five panels of the
AntiCoincidence
system (AC Top, 50-200 keV; AC Lat, 80-200 keV). The event lasted about 14
s and it
released a total number of 15515 counts in the MCAL detector (above a
background rate of 996 Hz),
and 49298 counts in the AC Top detector (above a background rate of 2674
Hz).
The AGILE ratemeters light curves can be found at
http://www.agilescienceapp.it/notices/GRB230207B_AGILE_RM_ND.png .

The event also triggered a (partial) high-time resolution MCAL data
acquisition,
from T0-1 s to T0+5 s (UTC), and released 116 counts in the detector, above
a background rate of 67 Hz. The MCAL light curve can be found
at
http://www.agilescienceapp.it/notices/GRB230207B_082154_602829648.000000.png
.

Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert
Notices
can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html