TITLE: GCN CIRCULAR NUMBER: 32796 SUBJECT: AGILE detection of the 2022 October 17 burst from SGR J1935+2154 reported by Konus-Wind DATE: 22/10/18 20:30:10 GMT FROM: Francesco Verrecchia at SSDC,INAF-OAR francesco.verrecchia@ssdc.asi.it
F. Verrecchia (SSDC, and INAF/OAR), C. Casentini (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Ursi (INAF/IAPS), M. Pilia (INAF/OA-Cagliari), A. Argan, M. Cardillo, L. Foffano, Y. Evangelista, E. Menegoni, G. Piano (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli, C. Pittori (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team:
The AGILE Anti-Coincidence system (AC Top; 50-200 keV), has detected a short X-ray burst coincident with the SGR J1935+2154 burst detected by Konus-Wind (GCN #32792) on 2022 October 17, at time 11:14:43.010 UT. AGILE has recently reported the detection of X-ray flaring activity with AC Top (GCN #32789) at time intervals near those reported by INTEGRAL, Fermi/GBM, Swift, NICER and Konus-Wind, having SGR J1935+2154 within the AGILE FoV. We report the AGILE AC Top detection of the burst on October 17 with the following parameters:
2022-10-17 11:14:43 , Counts: 4548 cts/s , Bkg: 2790 Hz , 23.62 sigma
This detection is an important confirmation of the origin of the X-ray flaring activity reported in GCN #32789 without a direct localization. Moreover the burst recently reported by GRBAlpha (GCN #32794) at time 2022-10-14 07:12:27.8 UT (with 4s time resolution), occurs 7.2 s before one of the 33 bursts reported in GCN #32789.
The AGILE AC ratemeters light curve including the October 17 burst can be found at: http://www.agilescienceapp.it/notices/SGR221017_AGILE_RM.png Additional analysis of AGILE data is in progress.