Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 24360

GRB 190501A: AGILE/MCAL and scientific ratemeters detection of a burst
2019-05-01T10:32:09Z (5 years ago)
Alessandro Ursi at INAF/IAPS <>
A. Ursi (INAF/IAPS), F. Verrecchia, F. Lucarelli (SSDC, and INAF/OAR), N.
Parmiggiani (INAF/OAS-Bologna), C. Pittori (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), A. Bulgarelli, V.
Fioretti, F. Fuschino, (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:

AGILE detected a long burst at T0 = 2019-05-01 05:23:23.58 +/- 0.01 s (UTC).

The event is visible in the scientific ratemeters (RMs) of the Super-AGILE
(SA, 18-60 keV), Anti-Coincidence (AC, 50-200 keV), and Mini-Calorimeter
(MCAL, 0.4-100 MeV) detectors. Their light curves show a multi-peaked FRED
profile, lasting ~24 s and releasing ~11200 counts in the SA RMs, lasting
~15 s and releasing ~2000 counts in the AC RMs, and lasting ~18 s and
releasing ~20200 counts in the MCAL RMs. The ratemeters light curves can be
found at

The event also triggered a Mini-Calorimeter (MCAL) data acquisition lasting
~8.6 s and releasing a total number of ~10140 counts in the detector (in
the 0.4-100 MeV energy range). The MCAL light curve can be found at:

Further analysis of the Gamma-Ray Imaging Detector (GRID) data is still in

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.
Looking for U.S. government information and services? Visit