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GCN Circular 32261

Subject
GRB 220624A: AGILE/GRID analysis
Date
2022-06-24T17:36:04Z (2 years ago)
From
Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>
F. Verrecchia, A. Ursi (INAF/IAPS), A. Giuliani (INAF/IASF-Mi), L. Foffano
(INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Longo
(Univ. Trieste and INFN Trieste), F. Lucarelli, C. Pittori (SSDC, and
INAF/OAR), G. Piano, A. Argan, M. Cardillo, Y. Evangelista, E. Menegoni
(INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, N. Parmiggiani
(INAF/OAS), M. Marisaldi (INAF/OAS, and Bergen University), M. Pilia,
A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), report on behalf of
the AGILE Team:

The Gamma-Ray Imaging Detector (GRID) of AGILE detected a gamma-ray 
transient
temporally coincident with the long�� GRB 220624A reported by Fermi/GBM in
GCN #32256 and also detected by AGILE/MCAL (Ursi et al., GCN #32259).

A preliminary GRID analysis shows a detection with a statistical 
significance
above 8 sigma over a time integration of 20 s starting from the T0 of GRB
220624A, at a sky position compatible with that of the GRB.
We obtained 25 events 2 of which are notably above 1 GeV.

The GRB position was about 30 deg off-axis from the GRID boresight.

These measurements were obtained with AGILE observing a large portion of
the sky in spinning mode. Additional analysis of AGILE data is in progress.
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