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GCN Circular 31175

GRB 211206A: AGILE/MCAL detection of a burst
2021-12-06T22:32:53Z (2 years ago)
Alessandro Ursi at INAF/IAPS <>
A. Ursi (INAF/IAPS), C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS,
and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C. Casentini, Y.
Evangelista, L. Foffano, E. Menegoni, G. Piano (INAF/IAPS), F. Lucarelli,
F. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, 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 Mini-CALorimeter (MCAL) detected a burst at T0 = 2021-12-06
19:51:10.80 +/- 0.01 s (UTC). The event lasted about 4.5 s and released a
total number of ~3374 counts in the detector (in the 0.4-100 MeV energy
range), above an average background rate of 599 Hz. The MCAL light curve
shows two main peaks and can be found at

The burst is also clearly 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 about 5 s and
it released a total number of 853 counts in the SA detector (above a
background rate of 90 Hz), 8286 counts in the MCAL detector (above a
background rate of 1260 Hz), and 18890 counts in the AC detector (above a
background rate of 3600 Hz). The AGILE ratemeter light curves can be found

The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the
energy range 0.4-100 MeV. Additional analysis of AGILE data is in progress.
Automatic MCAL GRB alert Notices can be found at:
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