[vsnet-grb-info 26488] GRB 201009A: AGILE detection of a burst

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28588
SUBJECT: GRB 201009A: AGILE detection of a burst
DATE:    20/10/09 10:19:29 GMT
FROM:    Alessandro Ursi at INAF/IAPS  <alessandro.ursi at gmail.com>

A. Ursi (INAF/IAPS), F. Verrecchia, 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
(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:

A few seconds after emerging from the SAA, the AGILE satellite detected a
burst, with a MCAL trigger at T0 = 2020-10-09 03:08:26 (UT). The event is
visible in the scientific ratemeters of the SuperAGILE (SA; 18-60 keV),
MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV)
detectors. The event lasted about ~6 s and released 1045 counts in the SA
detector (above a background rate of 74 Hz), 24910 counts in the MCAL
detector (above a background rate of 1176 Hz), and 43490 counts in the AC
detector (above a background rate of 3523 Hz). The AGILE RM light curves
can be found at:
http://www.agilescienceapp.it/notices/GRB201009A_AGILE_RMs.png . The event
could have possibly started earlier, as shown in the SuperAGILE light curve.

The event also triggered a partial high time resolution MCAL data
acquisition.

Additional analysis of AGILE data is in progress.