{
  "bibcode": "2020GCN.28723....1R",
  "body": "A. Ridnaia, S. Golenetskii, R. Aptekar, D. Frederiks,\nM. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 201020B\n(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 28702,\nMalacaria & Meegan, GCN Circ. 28710;\nAGILE detection: Ursi et al., GCN Circ. 28714;\nFermi-LAT detection: Arimoto et al., GCN Circ. 28716)\ntriggered Konus-Wind at T0=63237.477 s UT (17:33:57.477).\n\nThe burst light curve shows a multipeaked structure\nstarted at ~T0-5.6 s with a total duration of ~53.7 s.\nThe emission is seen up to ~6 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB201020_T63237/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 4.72(-0.61,+0.70)x10^-5 erg/cm2,\nand a 64-ms peak flux, measured from T0+8.016 s,\nof 1.38(-0.25,+0.25)x10^-5 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum of the burst\n(measured from T0 to T0+50.432 s)\nis best fit in the 20 keV - 6 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -1.12(-0.09,+0.10),\nthe high energy photon index beta = -2.55(-0.56,+0.26),\nthe peak energy Ep = 193(-23,+23) keV\n(chi2 = 72/97 dof).\n\nThe spectrum near the maximum count rate\n(measured from T0+7.424 to T0+8.448 s)\nis best fit in the 20 keV - 6 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.85(-0.13,+0.14),\nthe high energy photon index beta = -2.78(-3.16,+0.36),\nthe peak energy Ep = 259(-35,+44) keV\n(chi2 = 41/52 dof).\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 28723,
  "createdOn": 1603297089000,
  "email": "ridnaia@mail.ioffe.ru",
  "subject": "Konus-Wind detection of GRB 201020B",
  "submitter": "Anna Ridnaia at Ioffe Institute  <ridnaia@mail.ioffe.ru>",
  "eventId": "GRB 201020B"
}