TITLE:   GCN CIRCULAR
NUMBER:  27727
SUBJECT: AGILE detection of a burst from SGR 1935+2154 on May 10, 2020
DATE:    20/05/12 21:01:28 GMT
FROM:    Francesco Verrecchia at SSDC,INAF-OAR  <francesco.verrecchia@ssdc.asi.it>

F. Verrecchia (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), 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 = 2020-05-10
06:12:03.5 (UT). For technical reasons data were processed with a delay
of more than a day.

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 ~100 counts in the SA
ratemeter (above a background of ~43 Hz), and ~937 counts in the AC
ratemeter (above a background of ~4700 Hz). The light curves of SA and
AC ratemeters can be found at
https://tools.ssdc.asi.it/ImgView/Agile/SGR1935burst_lc_2020-05-1027
.

Considering the geometry of the satellite at T0, the burst detection is
compatible with a source at the position of SGR 1935+2154 as determined in
GCN #27714 (Hurley et al.).

Additional analysis of AGILE data is in progress.