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GCN Circular 23231

Subject
GRB 180914B: AGILE/GRID detection
Date
2018-09-15T14:06:01Z (6 years ago)
From
Alessandro Ursi at INAF/IAPS <alessandro.ursi@gmail.com>
GRB 180914B: AGILE/GRID detection

F. Verrecchia (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), F. Longo (Univ. Trieste and INFN
Trieste), A. Argan, M. Cardillo, A. Giuliani (INAF/IASF-Mi), Y.
Evangelista, G. Minervini, G. Piano (INAF/IAPS), F. Lucarelli, C.
Pittori (SSDC,
and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, 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 the long bright
GRB 180914B reported Ursi et al., GCN 23226.
A preliminary GRID analysis in the energy range 30 - 420 MeV shows a
detection
with a statistical significance of about 9 sigma, at the sky position
L,B: 85,-26 +/- 5 deg.

The gamma-ray emission detected by the AGILE-GRID lasted about 16 seconds,
and the preliminary estimated position is between 50 and 70 deg off-axis
angle.

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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