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GCN Circular 32247

Subject
GRB 220623A: AGILE detection
Date
2022-06-23T11:41:48Z (2 years ago)
From
Alessandro Ursi at INAF/IAPS <alessandro.ursi@gmail.com>
A. Ursi (INAF/IAPS), F. Lucarelli, 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, G. Piano
(INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, 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 the GRB 220623A at T0 = 2022-06-23 07:04:14 s
(UTC), reported by Swift BAT (GCN #32243), Swift XRT (GCN #32244), and
AstroSat CZTI (GCN #32246). The burst 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 25 s and it released a total number of 1950 counts in
the SA detector (above a background rate of 85 Hz), 29800 counts in the
MCAL detector (above a background rate of 1050 Hz), and 72370 counts in the
AC detector (above a background rate of 2770 Hz). The AGILE ratemeters
light curves can be found at
http://www.agilescienceapp.it/notices/GRB220623A_AGILE_RM.png .

The event also triggered a partial high time resolution MCAL data
acquisition, from T1 = 2022-06-23 07:04:09.65 s (UTC) to T2 = 2022-06-23
07:04:16.15 s (UTC), and released 4200 counts in the detector, above a
background rate of 530 Hz. The MCAL light curve can be found at
http://www.agilescienceapp.it/notices/GRB220623A_078852_583052654.000000.png
. At the T0, the event was 35 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.
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