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....
GRB 220624A: AGILE/GRID analysis / Verrecchia, F.; Ursi, A.; Giuliani, A.; Foffano, L.; Tavani, M.; Longo, F.; Lucarelli, F.; Pittori, C.; Piano, G.; Argan, A.; Cardillo, M.; Evangelista, Y.; Menegoni, E.; Bulgarelli, A.; di Piano, A.; Fioretti, V.; Parmiggiani, N.; Marisaldi, M.; Pilia, M.; Trois, A.; Donnarumma, I.; Agile, Team. - (2022).
GRB 220624A: AGILE/GRID analysis
di Piano, A.;
2022
Abstract
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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