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GCN Circular 8817

Subject
GRB 090117 - SuperAGILE Localization of a long GRB
Date
2009-01-17T17:35:37Z (15 years ago)
From
Marco Feroci at IASF/INAF <feroci@iasf-roma.inaf.it>
I. Donnarumma, E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto,
L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda
(INAF/IASF Rome), A. Giuliani, S. Vercellone, A. Chen,
S. Mereghetti, A. Pellizzoni, F. Perotti, P.
Caraveo (INAF/IASF Milan), 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), 
G. Barbiellini, F. Longo, E. Moretti (INFN Trieste), P. Picozza, 
A. Morselli (INFN Roma-2), M. Prest, E. Vallazza (Universita` 
dell'Insubria), P. Lipari, D. Zanello (INFN Roma-1), and  P. Giommi, C. 
Pittori, B. Preger, P. Santolamazza, F. Verrecchia (ASDC) and L. Salotti 
(ASI), on behalf of the AGILE Team, report:

"SuperAGILE detected a gamma ray burst on 17 January 2009, at 15:21:54 UT.
The event had a duration of about 10.0 s in the 20-60 keV energy range,
with a precursor followed by the main peak. Assuming a crab-like energy 
spectrum, the peak flux on 1-s timescale was about 
2.7E-07 erg/cm2/s. 
The burst position was reconstructed  as (RA, Dec)
(164.003 deg, -58.249 deg), which is:

RA(J2000)  = 10h 56m 00.75s
Dec(J2000) = -58d 14' 57.84"

with an uncertainty of 3' radius. The given uncertainty accounts
for both the statistical and systematic errors.

An analysis of the AGILE Gamma Ray Imager (GRID) data is in progress."

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