TITLE: GCN CIRCULAR NUMBER: 23231 SUBJECT: GRB 180914B: AGILE/GRID detection DATE: 18/09/15 14:06:01 GMT FROM: Alessandro Ursi at INAF/IAPS GRB 180914B: AGILE/GRID detection F. Verrecchia (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Longo (Univ. Trieste and INFN Trieste), A. Argan, M. Cardillo, A. Giuliani (INAF/IASF-Mi), Y. Evangelista, G. Minervini, G. Piano (INAF/IAPS), F. Lucarelli, C. Pittori (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, M. Marisaldi (INAF/OAS, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), report on behalf of the AGILE Team: The Gamma-Ray Imaging Detector (GRID) of AGILE detected the long bright GRB 180914B reported Ursi et al., GCN 23226. A preliminary GRID analysis in the energy range 30 - 420 MeV shows a detection with a statistical significance of about 9 sigma, at the sky position L,B: 85,-26 +/- 5 deg. The gamma-ray emission detected by the AGILE-GRID lasted about 16 seconds, and the preliminary estimated position is between 50 and 70 deg off-axis angle. These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of AGILE data is in progress.