[vsnet-grb-info 6391] GRB 080723B: AGILE GRID and MCAL results

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  8006
SUBJECT: GRB 080723B: AGILE GRID and MCAL results
DATE:    08/07/23 18:38:49 GMT
FROM:    Sandro Mereghetti at IASF/CNR  <sandro at iasf-milano.inaf.it>

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

Analysis of the AGILE Gamma Ray Imager Detector (GRID) data of the 
INTEGRAL GRB 080723B (Gotz et al.  GCN 8002, Del Monte et al. GCN 8003) 
does not reveal significant high-energy emission during the time interval 
of the prompt emission.

A preliminary estimate of the fluence, integrated over 100 s, gives a 99% 
c.l. upper limit of 0.03 photons/cm^2 for energy greater than 50 MeV.

GRB 080723B has also triggered on-board the AGILE Mini-Calorimeter (MCAL) 
at 13:22:33 UT (=T0). Using the preliminary in-flight calibration and 
assuming a Crab-like spectrum we can estimate a fluence of (8 +/- 2)x10^-6 
erg/cm^2 in the 350-700 keV energy range in the time interval between T0 
and T0+48 s.

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