GCN Circular 16058
Subject
GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
Date
2014-03-31T17:32:53Z (10 years ago)
From
Carlotta Pittori at ASDC <carlotta.pittori@asdc.asi.it>
C. Pittori, F. Verrecchia (ASDC and INAF/OAR),
A. Bulgarelli (INAF/IASF-Bo), A. Giuliani (INAF/IASF-Mi),
M. Tavani (INAF/IAPS Rome, and Univ. Roma Tor Vergata), P. Caraveo
(INAF/IASF-Mi), F. Lucarelli (ASDC and INAF/OAR), M. Marisaldi
(INAF/IASF-Bo), F. Longo (Univ. of Trieste and INFN Trieste), E. Del
Monte, F. Lazzarotto, I. Donnarumma, Y. Evangelista, M. Feroci,
L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda (INAF/IAPS
Rome), G. Barbiellini, (INFN Trieste), F. Fuschino, F. Gianotti,
M. Trifoglio, G. Di Cocco, C. Labanti, V. Fioretti, M. Galli
(INAF/IASF-Bo), S. Mereghetti, F. Perotti (INAF/IASF-Mi), M. Cardillo,
E. Striani, (INAF/IAPS Rome, and Univ. Roma Tor Vergata), A. Argan,
G. Piano, S. Sabatini, V. Vittorini (INAF/IAPS Rome), G. Pucella (ENEA
Frascati), A. Pellizzoni, A. Trois (INAF/OA Cagliari), M. Pilia
(ASTRON), S. Vercellone (INAF/IASF-Pa), P. W. Cattaneo, A. Rappoldi
(INFN Pavia), A. Morselli, P. Picozza (INFN Roma-2), M. Prest,
E. Vallazza (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN
Roma-1), A. Chen (Wits University), S. Colafrancesco (INAF/OAR and Wits
University), P. Giommi, and G. Valentini (ASI),
on behalf of the AGILE Team, report:
The AGILE Gamma Ray Imaging Detector (GRID) observed an intense and
prolonged high-energy emission above 100 MeV from GRB 140330A
(Fermi-LAT detection: G. Vianello et al., GCN 16048).
Despite a data telemetry gap of about 30 minutes occurring during the
prompt emission of this GRB, a maximum likelihood analysis of the
AGILE-GRID data integrated from 2014-03-30 04:50 UT (1805 s since
trigger time) to 2014-03-31 08:00 UT yields a detection at a
significance level larger than 4 sigma, with an average flux of
F=(2.30 +/- 0.98) 10-6 ph/cm2/s (E > 100 MeV).
Due to the high fluence of this burst at E>100 MeV, comparable only to
the one of GRB 130427A as recorded in the AGILE database, it was
possible to derive its properties using the maximum likelihood
techniques routinely used in the standard data analysis of AGILE-GRID
point sources.
This measurement was obtained with AGILE observing a large portion of
the sky in spinning mode.