[vsnet-grb-info 25587] AGILE detection of a short and hard X-ray burst possibly related to SGR 1935+2154

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27687
SUBJECT: AGILE detection of a short and hard X-ray burst possibly related to SGR 1935+2154
DATE:    20/05/04 11:34:49 GMT
FROM:    Francesco Verrecchia at SSDC,INAF-OAR  <francesco.verrecchia at ssdc.asi.it>

  A. Ursi (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS), M.
Pilia (INAF/OA-Cagliari), C. Pittori (SSDC, and INAF/OAR),  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),
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 a short hard X-ray burst at T0 = 2020-05-03
23:25:13.50 (UT).

The event is visible in the scientific ratemeters of the SuperAGILE (SA;
20-60 keV) detector and of the Anti-Coincidence (AC, 50-200 keV). The event
lasted ~0.5 s and released a total number of ~360 counts in the SA 
ratemeters
(above a background of ~60 Hz) while ~800 counts in the AC ratemeters 
(above
a background of ~4200 Hz). The SA and AC ratemeters light curves can be 
found at

http://www.agilescienceapp.it/notices/AGILE_RM_SGR1935+2154_20200503.png .

Considering the geometry of the satellite at T0, the burst detection is
compatible with a source at the position of SGR 1935+2154.

Additional analysis of AGILE data is in progress.