{
  "bibcode": "2021GCN.30969....1U",
  "body": "A. Ursi, M. Cardillo (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor\nVergata), A. Argan, C. Casentini, Y. Evangelista, E. Menegoni, L. Foffano,\nG. Piano (INAF/IAPS), F. Lucarelli, C. Pittori, F. Verrecchia (SSDC, and\nINAF/OAR), A. Bulgarelli, A. Di Piano, V. Fioretti, F. Fuschino, N.\nParmiggiani (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen\nUniversity), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), F.\nLongo (Univ. Trieste and INFN Trieste), A. Giuliani (INAF/IASF-Mi), report\non behalf of the AGILE Team:\n\nThe AGILE satellite detected the long GRB 211023A at T0 = 2021-10-23\n13:07:58 s (UTC), reported by Fermi GBM (GCNs #30958, #30965) and Fermi LAT\n(GCN #30961).\n\nThe burst is clearly visible in the AGILE scientific ratemeters of the\nSuperAGILE (SA; 20-60 keV), MiniCALorimeter (MCAL; 0.4-100 MeV), and\nAntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 45 s and\nit released a total number of 5300 counts in the SA detector (above a\nbackground rate of 90 Hz), 64325 counts in the MCAL detector (above a\nbackground rate of 1200 Hz), and 233020 counts in the AC detector (above a\nbackground rate of 2810 Hz). The AGILE ratemeter light curves can be found\nat http://www.agilescienceapp.it/notices/GRB211023A_AGILE_RM.png .\n\nThe event also triggered a partial high time resolution MCAL data\nacquisition, from T1 = 2021-10-23 13:07:32.91 s +/- 0.01 (UTC) to T2 =\n2021-10-23 13:08:05.20 +/- 0.01 s (UTC), and released 12480 counts in the\ndetector, above a background rate of 620 Hz. The time-integrated spectrum\nof the first 17 s of the burst can be fitted in the energy range 0.4-50 MeV\nwith a single power-law with ph. ind. = -2.45 (-0.27/+0.34), resulting in a\nreduced chi-squared of 0.89 (75 d.o.f.) and a fluence of 1.3e-05 ergs/cm^2\n(90% confidence level), in the same energy range. The MCAL light curve can\nbe found at:\nhttp://www.agilescienceapp.it/notices/075364_GRB211023A_562079268.000000.png\n.\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": 30969,
  "createdOn": 1635068565000,
  "email": "alessandro.ursi@gmail.com",
  "subject": "GRB 211023A: AGILE detection",
  "submitter": "Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>",
  "eventId": "GRB 211023A"
}