[vsnet-grb-info 26326] GRB 200914A: AGILE detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28426
SUBJECT: GRB 200914A: AGILE detection
DATE:    20/09/15 14:09:50 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), A. Argan, M. Cardillo, C.
Casentini, 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:

The AGILE satellite detected the long GRB 200914A, reported by Fermi-GBM
(GCNs #28417, #28424), INTEGRAL (GCN #28419), and Swift-XRT (GCN #28425) at
T0 = 2020-09-14 12:48:30 (UT).

The event is clearly 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 light curves show a double peaked time
profile, lasting about 17 s. The burst released 1510 counts in the SA
detector (above a background rate of 80 Hz), 22600 counts in the MCAL
detector (above a background rate of 1280 Hz), and 61510 counts in the AC
detector (above a background rate of 3720 Hz). The emission detected by the
MCAL and AC detectors starts about ~9 s after the T0. The initial part of
the burst detected by AGILE triggered also a MCAL high time resolution data
acquisition. The AGILE ratemeter light curves can be found at:
http://www.agilescienceapp.it/notices/GRB200914A_AGILE_RMs.png .

Additional analysis of AGILE data is in progress.