TITLE:   GCN CIRCULAR
NUMBER:  27776
SUBJECT: GRB 200521A: AGILE/MCAL and ratemeters detection
DATE:    20/05/21 18:02:57 GMT
FROM:    Francesco Verrecchia at SSDC,INAF-OAR  <francesco.verrecchia@ssdc.asi.it>

F. Verrecchia (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini,
G. Piano (INAF/IAPS),  F. Lucarelli, C. Pittori (SSDC, and INAF/OAR),
A. Bulgarelli, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), M. Pilia
(INAF/OA-Cagliari), F. Longo (Univ. Trieste, and INFN Trieste), report
on behalf of the AGILE Team:

The AGILE satellite detected the short burst GRB 200521A that triggered
the automatic AGILE Mini-CALorimeter (MCAL) GRB alert Notice (ID
512427408), published at:
https://gcn.gsfc.nasa.gov/agile_mcal.html.

The event was detected by MCAL at T0 = 2020-05-21 12:16:40.00 +/- 0.01
(UT), and lasted about 0.16 s and released a total number of ~795 counts
in the detector (in the 0.4-100 MeV energy range), above an average
background rate of 771 counts / s.
The event is also visible in the scientific ratemeters of the SuperAGILE
(SA; 20-60 keV), Anti-Coincidence (AC; 80-200 keV), and MCAL (0.4-100 MeV)
detectors.

The MCAL light curve can be found at:
http://www.agilescienceapp.it/notices/GRB_067901-067901_517148200.741647.png 
.

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.