{
  "bibcode": "2021GCN.30106....1U",
  "body": "A. Ursi (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), M. Tavani\n(INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C.\nCasentini, Y. Evangelista, G. Piano (INAF/IAPS), F. Lucarelli, C. Pittori,\nF. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, A. Di Piano,  V.\nFioretti, F. Fuschino, N. Parmiggiani (INAF/OAS-Bologna), M. Marisaldi\n(INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois\n(INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), report\non behalf of the AGILE Team:\n\nThe AGILE satellite detected the long GRB 210531A at T0 = 2021-05-31\n12:00:02.66 +/- 0.01 s (UTC), reported by Fermi/GBM (Trigger no. 644155206)\nand BALROG (GCN #30105).\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 35 s and\nit released a total number of 9650 counts in the SA detector (above a\nbackground rate of 90 Hz), 53900 counts in the MCAL detector (above a\nbackground rate of 1400 Hz), and 151900 counts in the AC detector (above a\nbackground rate of 3780 Hz). The AGILE ratemeter light curves can be found\nat http://www.agilescienceapp.it/notices/GRB210531A_AGILE_RM.png .\n\nThe event also triggered a partial high time resolution MCAL data\nacquisition.\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": 30106,
  "createdOn": 1622470742000,
  "email": "alessandro.ursi@gmail.com",
  "subject": "GRB 210531A: AGILE/MCAL detection (Fermi Trigger 644155206 / GRB 210531500)",
  "submitter": "Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>",
  "eventId": "GRB 210531A"
}