TITLE: GCN CIRCULAR NUMBER: 31270 SUBJECT: GRB 211219A: AGILE detection DATE: 21/12/20 17:27:59 GMT FROM: Alessandro Ursi at INAF/IAPS A. Ursi (INAF/IAPS), F. Lucarelli, C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), 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. 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 long GRB 211219A at T0 = 2021-12-19 14:55:22 (UTC), reported by Fermi GBM (GCN #31265). 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 6.0 s and it released a total number of 7115 counts in the MCAL detector (above a background rate of 1240 Hz), and 18620 counts in the AC detector (above a background rate of 3450 Hz). The AGILE ratemeter light curves can be found at http://www.agilescienceapp.it/notices/GRB211219A_AGILE_RM.png . At the T0, the event was about 63° 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.