TITLE:   GCN CIRCULAR
NUMBER:  23429
SUBJECT: GRB 181121A: AGILE/MCAL detection of a burst
DATE:    18/11/22 08:33:17 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>

*A.Ursi (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), *


*N. Parmiggiani (INAF/IASF-Bo), A. Argan, M. Cardillo, Y. Evangelista, G.
Minervini, G. Piano (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor
Vergata), F. Lucarelli, C. Pittori, (SSDC, and INAF/OAR), A. Bulgarelli, V.
Fioretti, F. Fuschino (INAF/IASF-Bo), M. Marisaldi (INAF/IASF-Bo, 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 short burst at T0 = 2018-11-21
20:43:36.283 +/- 0.01 s (UTC).*
*The light curve shows a sharp peak lasting about 0.16 s, that released a
total number of ~334 counts in the detector (in the 0.4-100 MeV energy
range), above an average background rate of 573 counts / s. Two weaker
pulses are present at T0+0.32 s and T0+0.67 s*

*.*
*The GRB is clearly detected also by AGILE scientific ratemeters; in
particular, by the Super-AGILE (20-60 keV), **Anti-Coincidence (50-200
keV), and MCAL (0.4-100 MeV) ratemeters.*



*Further analysis is still in progress.The AGILE-MCAL detector has a full
solid angle acceptance, and is operational in the range 0.4 - 100 MeV.*