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GCN Circular 33148

GRB 230104A: AGILE/MCAL detection of a burst
2023-01-04T09:40:45Z (a year ago)
Alessandro Ursi at INAF/IAPS <>
A. Ursi (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C.
Casentini, 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), F. Lucarelli, C. Pittori, F.
Verrecchia (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M. Marisaldi
(INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois
(INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), and P.
Tempesta (TeleSpazio), report on behalf of the AGILE Team:

The AGILE Mini-CALorimeter (MCAL) detected a burst at T0 = 2023-01-04
06:03:15.00 +/- 0.01 s (UTC). The event lasted about 1.10 s and released a
total number of 2073 counts in the MCAL detector (in the 0.4-100 MeV energy
range), above an average background rate of 594 Hz. The MCAL light curve
can be found at

The burst is also visible in the AGILE scientific ratemeters of the
MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV)
detectors, where it released a total number of 6525 counts in the MCAL
detector (above a background rate of 1200 Hz), and 13285 counts in the AC
detector (above a background rate of 3215 Hz). The AGILE ratemeters light
curves can be found at .

Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert
Notices can be found at:
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