{
  "bibcode": "2022GCN.32286....1F",
  "body": "D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,\nA. Tsvetkova,  M. Ulanov, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nThe long GRB 220624A (Fermi-GBM detection: Fermi GBM Team, GCN 32256; Lesage & Meegan, GCN Circ 32269;\nAGILE detection: Ursi et al., GCN Circ 32259;\nSwift/BAT-GUANO detection outside the coded FOV: Tohuvavohu et al., GCN Circ 32263;\nIPN triangulation: Kozyrev et al., GCN 32265;\nCALET-CGBM detection: Akaike et al., GCN Circ 32272)\ntriggered Konus-Wind (KW) at T0=10712.946 s UT (02:58:32.946).\n\nThe burst light curve shows three major emission episodes.\nThe first episode lasts from ~T0-3 s to ~T0+54 s,\nthe second - from ~T0-135 s to ~T0+168 s,\nand the third - from ~T0-291 s to ~T0+365 s.\nThe total duration of the burst is ~370 s.\nThe emission is seen up to ~10 MeV.\n\nThe Konus-Wind light curve of this GRB is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB220624_T10712/\n\nAs observed by Konus-Wind, the burst had\na fluence of (3.15 �� 0.49)x10^-4 erg/cm^2 and\na 64-ms peak energy flux, measured from T0 + 5.760 s,\nof (2.22 �� 0.15)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).\n\nThe time-integrated spectrum (measured from T0 to T0+340.224 s)\nis best fit in the 20 keV - 15 MeV range\nby a GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -0.89 (-0.14,+0.17),\nthe high energy photon index beta = -2.11 (-0.28,+0.17),\nthe peak energy Ep = 379 (-71,+86) keV,\nchi2 = 65/97 dof.\n\nThe spectrum near the peak count rate (measured from T0 to T0+14.336 s)\nis best fit in the 20 keV - 15 MeV range\nby a GRB (Band) function with the following model parameters:\nthe low-energy photon index alpha = -0.51 (-0.06,+0.06),\nthe high energy photon index beta = -2.17 (-0.06,+0.06),\nthe peak energy Ep = 439 (-25,+27) keV,\nchi2 = 89/97 dof.\n\nAll the quoted errors are estimated at the 90% confidence level.\nAll the presented results are preliminary.",
  "circularId": 32286,
  "createdOn": 1656420296000,
  "email": "fred@mail.ioffe.ru",
  "subject": "Konus-Wind detection of GRB 220624A",
  "submitter": "Dmitry Frederiks at Ioffe Institute  <fred@mail.ioffe.ru>",
  "eventId": "GRB 220624A"
}