[vsnet-grb-info 25265] GRB 200311A: AGILE/MCAL and scientific ratemeters observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27365
SUBJECT: GRB 200311A: AGILE/MCAL and scientific ratemeters observations
DATE:    20/03/11 18:54:28 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi at gmail.com>

A. Ursi (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), M. Pilia
(INAF/OA-Cagliari), C. Pittori, F. Verrecchia (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, V. Fioretti, F. Fuschino, N. Parmiggiani
(INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen University),
A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani
(INAF/IASF-Mi), report on behalf of the AGILE Team:

The AGILE satellite detected the long burst GRB 200311A reported by
Fermi/GBM (GCN #27363), that also triggered the automatic AGILE
Mini-CALorimeter (MCAL) GRB alert Notice (ID 511024575), published at:
https://gcn.gsfc.nasa.gov/agile_mcal.html.

The event is visible in the scientific ratemeters (RMs) of the
Anti-Coincidence (AC, 50-200 keV) and MCAL (0.4-100 MeV) detectors. The
burst light curve shows a multi-peaked profile, lasting ~25 s and releasing
~33000 counts in the MCAL RMs. The ratemeters light curves can be found at
http://www.agilescienceapp.it/notices/GRB_066883_511024575.756958_RM.png.

The event also triggered an MCAL data acquisition at T0 = 2020-03-11
15:16:15.75 +/- 0.01 s (UTC), lasting ~10 s and releasing a total number of
~7550 counts in the detector, above a background rate of ~700 Hz. The MCAL
light curve can be found at:
http://www.agilescienceapp.it/notices/GRB_066883_511024575.756958.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.