{
  "format": "text/plain",
  "submittedHow": "web",
  "body": "A. Ridnaia, D. Frederiks, A. Lysenko, V. Panteleeva,\nD. Svinkin, A. Tsvetkova,  M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 261017A\n(Fermi-GBM detection: Fermi GBM team, GCN 45973; \nMukherjee et al., GCN 45976\nSwift-BAT detection: Siegel et al., GCN 45974;\nBarthelmy et al., GCN 45985)\ntriggered Konus-Wind at T0=57906.065 s UT (16:05:06.065).\n\nThe burst light curve shows a multipeaked structure\nwhich starts at ~T0-2.4 s and has a total duration of ~10.8 s.\nThe emission is seen up to ~3 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB261017_T57906/\n\nAs observed by Konus-Wind, the burst\nhad the total fluence of 1.96(-0.14,+0.15)x10^-5 erg/cm2,\nand the 64-ms peak flux, measured from T0-0.064 s,\nof 6.37(-1.28,+1.30)x10^-6 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+8.448 s)\nis best fit in the 20 keV - 10 MeV range\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith alpha = -0.06(-0.16,+0.18)\nand Ep = 899(-80,+93) keV (chi2 = 90/89 dof).\nFitting by a GRB (Band) model yields the same alpha and Ep,\nand an upper limit on the high energy photon index: beta < -3.0\n(chi2 = 90/88 dof).\n\nAll the quoted errors are at the 68% confidence level.\nAll the quoted values are preliminary.",
  "eventId": "GRB 261017A",
  "submitter": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
  "circularId": 45990,
  "eventType": [
    "GRB",
    "Gamma-ray Transient"
  ],
  "subject": "Konus-Wind detection of GRB 261017A",
  "createdOn": 1792421877728
}