{
  "bibcode": "2020GCN.28829....1U",
  "body": "A. Ursi (INAF/IAPS), F. Verrecchia, C. Pittori (SSDC, and INAF/OAR), M.\nTavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C.\nCasentini, Y. Evangelista, G. Piano (INAF/IAPS), F. Lucarelli (SSDC, and\nINAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, N. Parmiggiani\n(INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen University),\nM. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), F. Longo (Univ.\nTrieste and INFN Trieste), A. Giuliani (INAF/IASF-Mi), report on behalf of\nthe AGILE Team:\n\nThe AGILE Mini-CALorimeter (MCAL) detected GRB 201104A at T0 = 2020-11-04\n00:00:56.77 +/- 0.01 s (UTC), reported by Fermi/GBM (GCN #28823) and\nINTEGRAL/SPI-ACS (trigger ID 8789,0).\n\nThe event lasted about 8 s and released a total number of ~7200 counts in\nthe detector (in the 0.4-100 MeV energy range), above an average background\nrate of 640 Hz.\n\nThe light curve shows sveral episodes and can be found at\nhttp://www.agilescienceapp.it/notices/GRB_070287_531532856.770000.png .\n\nThe time-integrated spectrum of the burst can be fitted in the energy range\n0.4-20 MeV with a single power-law with ph.ind. = -2.26 -0.15/+0.18,\nresulting in a reduced chi-squared of 1.06 (75 d.o.f.) and a fluence of\n3.57e-06 ergs/cm^2 (90% confidence level), in the same energy range.\n\nThe burst is clearly visible in the AGILE scientific ratemeters of the MCAL\ndetector. The event released a total number of 25100 counts, above a\nbackground rate of 1255 Hz. The AGILE ratemeter light curves can be found\nat http://www.agilescienceapp.it/notices/GRB_201104A_AGILE_RM.png .\n\nThe AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the\nenergy range 0.4-100 MeV. Additional analysis of AGILE data is in progress.\nAutomatic MCAL GRB alert Notices can be found at:\nhttps://gcn.gsfc.nasa.gov/agile_mcal.html.\n\n[GCN OPS NOTE(06Nov20): Due to the uncertainty of the arrival time with respect \nto the downtime window (15 hours) of the GCN Circulars processing system, \nthe error in the date-time in the header of this Circular can be off anywhere from 0-15 hours.]",
  "circularId": 28829,
  "createdOn": 1604522805000,
  "email": "alessandro.ursi@gmail.com",
  "subject": "GRB 201104A: AGILE/MCAL detection",
  "submitter": "Alessandro Ursi at INAF/IAPS  <alessandro.ursi@gmail.com>",
  "eventId": "GRB 201104A"
}