Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 32129

GRB 220527A: AGILE detection
2022-05-27T12:18:27Z (2 years ago)
Alessandro Ursi at INAF/IAPS <>
A. Ursi, G. Piano (INAF/IAPS), 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, L. Foffano, E. Menegoni
(INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR), A. Bulgarelli, A. Di Piano,
V. Fioretti, F. Fuschino, N. Parmiggiani (INAF/OAS-Bologna), M. Romani
(INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M.
Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani
(INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta
(TeleSpazio), report on behalf of the AGILE Team:

The AGILE satellite detected a burst at T0 = 2022-05-27 09:17:14.55 (UTC).
The event is clearly visible in the AGILE scientific ratemeters of the
SuperAGILE (SA; 20-60 keV), MiniCALorimeter (MCAL; 0.4-100 MeV), and
AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 15 s and
it released a total number of 1860 counts in the SA detector (above a
background rate of 50 Hz), 27875 counts in the MCAL detector (above a
background rate of 1380 Hz), and 67515 counts in the AC detector (above a
background rate of 3470 Hz). The AGILE ratemeter light curves can be found
at .

The event also triggered a high time resolution MCAL data acquisition,
where it released 12500 counts in the detector, above a background rate of
630 Hz. We notice that most of the signal is revealed in the E < 1.4 MeV
energy channels. The MCAL light curve can be found at

Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert
Notices can be found at:
Looking for U.S. government information and services? Visit