{
  "bibcode": "2021GCN.29315....1S",
  "body": "D. Svinkin, S. Golenetskii, D. Frederiks, M. Ulanov,\nA. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 210112A\n(Swift-BAT detection: Ambrosi et al., GCN Circ. 29289;\nAGILE detection: Ursi et al., GCN Circ. 29293)\ntriggered Konus-Wind at T0=5886.553 s UT (01:38:06.553).\n\nThe burst light curve shows a multipeaked structure\nwhich starts at ~T0-73 s and has a total duration of ~143 s.\nThe emission is seen up to ~5 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB210112_T05886\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 6.72(-0.65,+0.72)x10^-5 erg/cm2,\nand a 64-ms peak flux, measured from T0+7.856 s,\nof 1.02(-0.18,+0.19)x10^-5 erg/cm2/s\n(both in the 20 keV - 16 MeV energy range).\n\nThe time-averaged spectrum of the burst\n(measured from T0 to T0+68.608 s)\nis best fit in the 20 keV - 16 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.96(-0.08,+0.08),\nthe high energy photon index beta = -2.71(-0.53,+0.25),\nthe peak energy Ep = 214(-16,+18) keV\n(chi2 = 87/97 dof).\n\nThe spectrum near the maximum count rate\n(measured from T0+7.168 s to T0+9.216 s)\nis best fit in the 20 keV - 16 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.85(-0.12,+0.13),\nthe high energy photon index beta = -2.67(-0.57,+0.27),\nthe peak energy Ep = 219(-25,+28) keV\n(chi2 = 38/65 dof).\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 29315,
  "createdOn": 1610926132000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "Konus-Wind detection of GRB 210112A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 210112A"
}