[vsnet-grb-info 21134] GRB 180914B: AGILE/GRID detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23233
SUBJECT: GRB 180914B: AGILE/GRID detection
DATE:    18/09/15 14:51:10 GMT
FROM:    Francesco Verrecchia at ASDC  <francesco.verrecchia at ssdc.asi.it>

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. Piano (INAF/IAPS), F. Lucarelli, C. Pittori, 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 in 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: 85.0, -26.0 +/- 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.

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