GRB 230405B: AGILE detection

The AGILE satellite detected the GRB 230405B at T0 = 2023-04-05 19:58:03 s (UTC), reported by Fermi (GCNs #33570, #33583), Swift (GCNs #33571, #33572, #33574, #33576, #33584), AstroSat CZTI (GCN #33575), MeerLICHT (GCN #33582), and Global MASTER-Net (GCN #33573). 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 5 s and it released a total number of 3105 counts in the MCAL detector (above a background rate of 539 Hz), and 16691 counts in AC-Top detector (above a background rate of 2650 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB230405B_AGILE_RM_ND.png . At the T0, the event was 83 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 <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Privo di virus.www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>