GCN Circular 33435
Subject
GRB 230308A: AGILE/MCAL detection
Date
2023-03-09T10:09:30Z (2 years ago)
From
Claudio Casentini at INAF-IAPS <claudio.casentini@inaf.it>
C. Casentini (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR),
M. Tavani (INAF/IAPS and Uni. Roma Tor Vergata), C. Pittori,
F. Lucarelli, F. Verrecchia (SSDC, and INAF/OAR), A. Argan,
M. Cardillo, Y. Evangelista, L. Foffano, G. Piano (INAF/IAPS),
A. Addis, L. Baroncelli, A. Bulgarelli, A. Di Piano, V. Fioretti,
G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), M. Romani
(INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, Bergen University),
M. Pilia, A. Trois (INAF/OA Cagliari), I. Donnarumma, E. Menegoni,
A.Ursi (ASI), A. Giuliani (INAF/IASF-Mi) and P. Tempesta (TeleSpazio),
report on behalf of the AGILE Team:
The AGILE satellite detected the short GRB 2300308A at
T0 = 2023-03-08 13:32:27.400 (UTC), reported by Fermi/GBM (GCN #33420) and
BALROG (GCN #33421).
The burst is clearly visible in the AGILE scientific ratemeters of the
MiniCALorimeter (MCAL; 0.4-100 MeV), and in all the panels of the
AntiCoincidence detectors (AC Top, 50-200 keV, ACLat, 80-200 keV).
The event lasted about 1 s and it released a total number of 1166 counts
in the MCAL detector (above a background rate of 576 Hz), and 7526 counts
in the AC Top detector (above a background rate of 3445 Hz).
The AGILE ratemeters light curves can be found at:
http://www.agilescienceapp.it/notices/GRB230308A_AGILE_RM_ND.png .
The event also triggered a high-time resolution MCAL data acquisition,
from T0 to T0+12 s (UTC), and released 1484 counts in the detector,
above a background rate of 590 Hz. The MCAL light curve can be found at:
http://www.agilescienceapp.it/notices/GRB230308A_082579_605367147.400000.png
.
At the T0 the event was 133 deg off-axis. 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