[vsnet-grb-info 26135] GRB 200808A: AGILE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28235
SUBJECT: GRB 200808A: AGILE detection
DATE:    20/08/09 13:27:57 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi at gmail.com>

A. Ursi (INAF/IAPS), C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS,
and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS), A. Argan, M.
Cardillo, Y. Evangelista, G. Piano (INAF/IAPS), F. Lucarelli, F. Verrecchia
(SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, N.
Parmiggiani (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen
University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), F.
Longo (Univ. Trieste and INFN Trieste), A. Giuliani (INAF/IASF-Mi), report
on behalf of the AGILE Team:

The AGILE satellite detected emission most likely associated with the long
burst GRB 200808A reported by Fermi-GBM (GCN #28230). The event is visible
in the scientific ratemeters of the SuperAGILE detector (SA; 18-60 keV),
starting at T0 = 2020-08-08 11:15:05 (UT). The SA light curve shows two
separate emission episodes about 250 s apart. The first episode lasted
about 27 s and released ~4350 counts; the second episode lasted about 50 s
and released ~7900 counts in the detector, above a background rate of 60
Hz. The event has an off-axis angle of about 40 degrees. The SA light curve
can be found at:
http://www.agilescienceapp.it/notices/GRB200808A_AGILE_RMs.png .

No detection is visible in the scientific ratemeters of the MiniCALorimeter
(MCAL; 0.4-100 MeV).

Additional analysis of AGILE data is in progress.