//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 33148 SUBJECT: GRB 230104A: AGILE/MCAL detection of a burst DATE: 23/01/04 09:40:45 GMT FROM: 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 http://www.agilescienceapp.it/notices/GRB230104A_081663_599896995.000000.png . 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 http://www.agilescienceapp.it/notices/GRB230104A_AGILE_RM_D.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.