GCN Circular 34402

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

The AGILE satellite detected the GRB 230812B at T0 = 2023-08-12 18:58:12 s (UTC),
reported by Fermi (GCNs #34386, #34387, #34391, #34392), Swift (GCNs #34388, #34393,
#34394, #34395, #34399, #34400) and MASTER (GCNs #34389, #34396).

The event lasted about 8 s and it released a total number of 17046 counts in the MCAL
detector (above a background rate of 590 Hz) and 97310 counts in the AC-Top detector
(above a background rate of 3188 Hz). The AGILE ratemeters light curves can be found
at http://www.agilescienceapp.it/notices/GRB230812B_AGILE_RM_ND.png .

The event also triggered a high time resolution MCAL data acquisition,
from T0 s to T0+2 s (UTC), and released 12643 counts in the detector, above
a background rate of 561 Hz. The MCAL light curve can be found
at http://www.agilescienceapp.it/notices/GRB230812B_084865_618951492.000000.png .

At the T0, the event was 55 deg off-axis.

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