GCN Circular 29782

A. Ursi (INAF/IAPS), F. Verrecchia, C. Pittori (SSDC, and INAF/OAR), M.
Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C.
Casentini, Y. Evangelista, 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 210410A at T0 = 2021-04-10
00:53:16.64 +/- 0.01 s (UTC), reported by Fermi/GBM (GCN #29777), Swift/XRT
(GCN #29778), and Fermi/LAT (GCN #29781).

The burst is visible in the AGILE scientific ratemeters of the SuperAGILE
(SA; 20-60 keV), MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence
(AC; 50-200 keV) detectors. The event lasted ~15 s and released a total
number of 1050 counts in the SA detector (above a background rate of 60
Hz), 29400 counts in the MCAL detector (above a background rate of 1200
Hz), and 72250 counts in the AC detector (above a background rate of 3320
Hz). The AGILE ratemeter light curves can be found at
http://www.agilescienceapp.it/notices/GRB210410_AGILE_RM.png .

The event also triggered a partial high time resolution MCAL data
acquisition, whose light curve can be found at:
http://www.agilescienceapp.it/notices/072541_GRB_545100796.643050.png .

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.