{
  "bibcode": "2022GCN.32614....1R",
  "body": "A.Ridnaia, D. Frederiks, A.Lysenko, D. Svinkin,\nA. Tsvetkova,  M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 220930A\n(Swift-BAT detection: Cenko et al., GCN 32603,\nBarthelmy et al., GCN 32612;\nAstroSat-CZTI detection: Gopalakrishnan et al., GCN 32613)\ntriggered Konus-Wind at T0=40312.503 s UT (11:11:52.503).\n\nThe burst light curve shows a multipeaked structure\nwhich starts at ~T0-1.5 s and has a total duration of ~76.0 s.\nThe emission is seen up to ~4 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB220930_T40312/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 1.78(-0.64,+0.98)x10^-5 erg/cm2,\nand a 64-ms peak flux, measured from T0+0.960 s,\nof 5.39(-2.28,+2.15)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+73.984 s)\nis best fit in the 20 keV - 10 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.06(-1.06,+1.43),\nthe high energy photon index beta = -2.41(-0.51,+0.46),\nthe peak energy Ep = 198(-58,+181) keV\n(chi2 = 91/98 dof).\n\nThe spectrum near the maximum count rate\n(measured from T0 to T0+8.448 s)\nis best fit in the 20 keV - 10 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.38(-0.56,+0.66),\nthe high energy photon index beta = -2.25(-1.42,+0.23),\nthe peak energy Ep = 215(-52,+121) keV\n(chi2 = 97/96 dof).\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 32614,
  "createdOn": 1664730567000,
  "email": "ridnaia@mail.ioffe.ru",
  "subject": "Konus-Wind detection of GRB 220930A",
  "submitter": "Anna Ridnaia at Ioffe Institute  <ridnaia@mail.ioffe.ru>",
  "eventId": "GRB 220930A"
}