{
  "bibcode": "2022GCN.32885....1U",
  "body": "A. Ursi, F. Longo (Univ. Trieste and INFN Trieste), C. Pittori, F.\nVerrecchia (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor\nVergata), A. Argan, M. Cardillo, C. Casentini, Y. Evangelista, L. Foffano,\nE. Menegoni, G. Piano (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti,\nG. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli (SSDC, and\nINAF/OAR), M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, and\nBergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma\n(ASI), A. Giuliani (INAF/IASF-Mi), and P. Tempesta (TeleSpazio), report on\nbehalf of the AGILE Team:\n\nThe AGILE satellite detected the GRB 221028A at T0 = 2022-10-28 13:16:27 s\n(UTC), reported by Swift BAT (GCN #32874). The burst is clearly visible in\nthe AGILE scientific ratemeters of the MiniCALorimeter (MCAL; 0.4-100 MeV)\nand AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 2 s\nand it released a total number of 3155 counts in the MCAL detector (above a\nbackground rate of 1180 Hz), and 7270 counts in the AC detector (above a\nbackground rate of 3410 Hz). The AGILE ratemeters light curves can be found\nat http://www.agilescienceapp.it/notices/GRB221028A_AGILE_RM.png .\n\nThe event also triggered a high time resolution MCAL data acquisition, from\nT0-4.31 s to T0+33.35 s (UTC), and released 1924 counts in the detector,\nabove a background rate of 477 Hz. The MCAL light curve can be found at\nhttp://www.agilescienceapp.it/notices/GRB221028A_080686_594047787.000000.png\n. The time-integrated spectrum of the burst between T0-2s and T0+7s be\nfitted in the energy range 0.4-10 MeV with a power-law with ph. ind. =\n-2.65 (-0.39/+0.50), resulting in a reduced chi-squared of 0.78 (48 d.o.f.)\nand a fluence of 3.1e-06 ergs/cm^2 (90% confidence level), in the same\nenergy range. At the T0, the event was 49 deg off-axis.\n\nAdditional analysis of AGILE data is in progress. Automatic MCAL GRB alert\nNotices can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html.",
  "circularId": 32885,
  "createdOn": 1667033007000,
  "email": "alessandro.ursi@gmail.com",
  "subject": "GRB 221028A: AGILE detection",
  "submitter": "Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>",
  "eventId": "GRB 221028A"
}