TITLE:   GCN CIRCULAR
NUMBER:  32401
SUBJECT: GRB 220715A: AGILE/MCAL detection
DATE:    22/07/15 15:24:26 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>

A. Ursi (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), F.
Verrecchia, C. Pittori (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), 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), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A.
Giuliani (INAF/IASF-Mi), report on behalf of the AGILE Team:

The AGILE Mini-CALorimeter (MCAL) detected the GRB 220715A at T0 =
2022-07-15 08:49:40.23 +/- 0.01 s (UTC), reported by Fermi GBM (GCN #32399).

The event lasted about 0.40 s and released a total number of 300 counts in
the MCAL detector (in the 0.4-100 MeV energy range), above an average
background rate of 480 Hz. The MCAL light curve can be found at
http://www.agilescienceapp.it/notices/079170_GRB_MCAL_584959780.229917.png
. The time-integrated spectrum of the burst, from T0-0.10 s to T0+0.30 s,
can be fitted in the energy range 0.4-10 MeV with a power-law with ph.ind.
= -2.06 (-0.367,+0.49), resulting in a reduced chi-squared of 0.86 (24
d.o.f.) and a fluence of 6.20e-07 erg/cm^2 (90% confidence level), in the
same energy range. At the T0, the event was 65 deg off-axis.

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.
Automatic MCAL GRB alert Notices can be found at:
https://gcn.gsfc.nasa.gov/agile_mcal.html.