TITLE: GCN CIRCULAR NUMBER: 32801 SUBJECT: AGILE detection of a burst from SGR J1935+2154 reported by VZLUSAT-2 DATE: 22/10/19 11:47:41 GMT FROM: Francesco Verrecchia at SSDC,INAF-OAR francesco.verrecchia@ssdc.asi.it
C. Casentini (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), 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; AC Lat3, 80-200 keV), has detected also a short X-ray burst coincident with the SGR J1935+2154 burst reported by VZLUSAT-2 (GCN #32797), as reported yesterday (GCN #32796) for the 2022 October 17 burst by Konus-Wind (GCN #32792). The burst detected by VZLUSAT-2 occurred on October 12 at time 2022-10-12 23:26:41. We report the detection of AC Top and AC Lat3 with the following parameters
ACTop: 2022-10-12 23:26:41 , Counts: 3549 cts/s , Bkg: 3080 Hz , 8.45 sigma ACLAT3: 2022-10-12 23:26:41 , Counts: 3500 cts/s , Bkg: 2400 Hz , 21.50 sigma
This burst was not included in the 33 bursts reported in GCN #32789 because it occurred when the source was at off-axis angle slightly higher than our threshold. We note that for this reason the burst is also detected at higher significance on the AC Lat3. Also this detection is a confirmation of the X-ray bursting activity reported by AGILE AC Top (GCN #32796).
The AGILE AC ratemeters light curve including the October 12 burst can be found at: http://www.agilescienceapp.it/notices/sgr_burst_12_10_22.png Additional analysis of AGILE data is in progress.