TITLE: GCN CIRCULAR NUMBER: 33555 SUBJECT: GRB 230402A: AGILE detection DATE: 23/04/02 19:27:16 GMT FROM: Claudio Casentini at INAF-IAPS claudio.casentini@inaf.it
C. Casentini (INAF/IAPS), C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS and Uni. Roma Tor Vergata), F. Lucarelli, F. Verrecchia(SSDC, and INAF/OAR), A. Argan, M. Cardillo, Y. Evangelista, L. Foffano, G. Piano (INAF/IAPS), A. Addis, L. Baroncelli, A. Bulgarelli, A. Di Piano, V. Fioretti, G.Panebianco, N. Parmiggiani (INAF/OAS-Bologna), M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, Bergen University), M. Pilia, A. Trois (INAF/OA Cagliari), I. Donnarumma, E. Menegoni, A.Ursi (ASI), A. Giuliani (INAF/IASF-Mi) and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team:
The AGILE satellite detected the GRB 230402A at T0 = 2023-04-02 07:32:35 s (UTC), reported by Fermi GBM (GCN #33553).
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 s and it released a total number of 5504 counts in the MCAL detector (above a background rate of 576 Hz), and 23987 counts in AC detector (above a background rate of 2949 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB230402A_AGILE_RM_ND.png .
At the T0, the event was 81 deg 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