TITLE: GCN CIRCULAR NUMBER: 32856 SUBJECT: GRB 221023A: AGILE/GRID analysis DATE: 22/10/26 15:16:15 GMT FROM: Francesco Verrecchia at SSDC,INAF-OAR F. Verrecchia (SSDC, and INAF/OAR), C. Pittori (SSDC, and INAF/OAR) A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), L. Foffano (INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR), M. Romani(INAF/OA-Brera), G. Piano, A. Argan, M. Cardillo, Y. Evangelista, E. Menegoni (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS), M. Marisaldi (INAF/OAS, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team: The Gamma-Ray Imaging Detector (GRID) of AGILE detected gamma-ray transient emission consistent with the long GRB 221023A reported by AGILE/MCAL (GCN #32825) at T0 = 2022-10-23 20:41:34 s (UTC), also detected by Fermi/GBM (GCN #32826, #32845), Fermi/LAT (GCN #82831) and Konus-Wind (GCN #32849). A refined AGILE/GRID data analysis in the energy range 30 MeV - 10 GeV shows a detection with a statistical significance of about 4.3 sigma overa time integration of 50 s starting at the T0 of GRB 221023A, at a sky position with Galactic coordinates l=28 deg, b=53 deg, with and an error radius of 4 deg (90% statistical + systematic error; R.A.= 232 deg, Decl.= 19 deg (J2000)). The GRID error circle includes the LAT position. During the 120s integration, we detected a total of 22 events (11 background events estimated through a Li&Ma analysis), 16 events at energies above 100 MeV, and 2 events above 1 GeV. These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of AGILE data is in progress.