GCN Circular 32822

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

The AGILE satellite detected the GRB 221022B at T0 = 2022-10-22 22:56:11.76
+/- 0.01 s (UTC), reported by Fermi GBM (#GCN 32820
Not found
 
 
, trigger no. 688172153).

The burst is clearly visible in the AGILE scientific ratemeters of the
MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV)
detectors. The event lasted about 15 s and it released a total number of
27380 counts in the MCAL detector (above a background rate of 1070 Hz), and
80780 counts in the AC detector (above a background rate of 2760 Hz). The
AGILE ratemeter light curves can be found at
http://www.agilescienceapp.it/notices/GRB221022B_AGILE_RM.png .

The event also triggered a partial high time resolution MCAL data
acquisition, covering the onset of the first episode, from T0-33.15 s to
T0+1.70 s, and released a total number of ~830 counts in the detector,
above an average background rate of 588 Hz. The MCAL light curve can be
found at
http://www.agilescienceapp.it/notices/080607_GRB_MCAL_593564171.767936.png .

The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the
energy range 0.4-100 MeV. 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.