[vsnet-grb-info 7510] AGILE Gamma-ray detection of GRB 090401B

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9069
SUBJECT: AGILE Gamma-ray detection of GRB 090401B
DATE:    09/04/01 13:17:12 GMT
FROM:    Marco Feroci at IASF/INAF  <feroci at iasf-roma.inaf.it>

E. Moretti, F. Longo, G. Barbiellini, E. Vallazza (INFN Trieste),  
A. Giuliani (INAF/IASF Milan), S. Cutini, C. Pittori (ASDC),
A. Chen, S. Mereghetti, F. Perotti, P. Caraveo (INAF/IASF Milan),
E. Del Monte, I. Donnarumma, Y. Evangelista, M. Feroci, L. Pacciani,
P. Soffitta, E. Costa, F. Lazzarotto, I. Lapshov, M. Rapisarda 
(INAF/IASF Rome), A. Pellizzoni, M. Pilia (INAF/OA Cagliari), 
S. Vercellone (INAF/IASF Palermo), A. Bulgarelli, F. Gianotti, 
M. Trifoglio, G. Di Cocco, C. Labanti, F. Fuschino, M. Marisaldi, 
M. Galli, (INAF/IASF Bologna), M. Tavani, G. Pucella, F. D'Ammando, 
V. Vittorini, A. Argan, A. Trois, G. Piano, S. Sabatini (INAF/IASF Rome), 
P. Picozza, A. Morselli (INFN Roma-2), M. Prest (Universita` 
dell'Insubria), P. Lipari, D. Zanello (INFN Roma-1), A.Rappoldi, 
P. Cattaneo (INFN Pavia) and P. Giommi, P. Santolamazza
F.Verrecchia (ASDC) and L. Salotti (ASI), on behalf of the AGILE Team, 
report:

The gamma ray burst 090401B (Schady et al. GCN 9066 & 9067) occurred 
in the field of view of AGILE, approximately 41 deg off-axis. 
This 12-s long event was triggered and localized in one dimension by 
SuperAGILE. It was detected also by the AGILE/ACS and MCAL, with 
significant detection above 2.8 MeV.
  
A preliminary analysis of the Gamma-Ray Imaging Detector (GRID) data
in temporal and spatial coincidence with the GRB shows a significant 
excess of gamma-ray events above 30 MeV at the location of the event.

A more detailed analysis of the AGILE-GRID data is in progress.
More observations of this interesting burst are strongly encouraged.
 
This message may be cited.