TITLE: GCN CIRCULAR NUMBER: 31044 SUBJECT: GRB 211105A: AGILE detection of a burst DATE: 21/11/05 10:06:12 GMT FROM: Alessandro Ursi at INAF/IAPS <alessandro.ursi@gmail.com> A. Ursi, E. Menegoni (INAF/IAPS), 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, G. Piano (INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR), A. Bulgarelli, A. Di Piano, 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 211105A at T0 = 2021-11-05 04:36:04 s (UTC). The burst is clearly visible in the AGILE scientific ratemeters of the SuperAGILE (SA; 20-60 keV) and MiniCALorimeter (MCAL; 0.4-100 MeV) detectors. The event lasted about 100 s and it released a total number of 14900 counts in the SA detector (above a background rate of 105 Hz) and 133500 counts in the MCAL detector (above a background rate of 1240 Hz). The AGILE ratemeter light curves can be found at http://www.agilescienceapp.it/notices/GRB211105A_AGILE_RM.png Additional analysis of AGILE data is in progress.