{
  "submitter": "Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>",
  "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\nOn July 2, 2025, Konus-Wind (KW) detected, in the waiting mode,\na hard X-ray activity, consistent in time with GRBs 250702B, C, D, E,\nreported by Fermi-GBM team (GCN 40883, 40885, 40886, 40890, 40891),\nlocalized by Swift/BAT-GUANO (GCN 40903),\nassociated with the X-ray transient EP250702a (GCN 40906),\nand detected by MAXI/GSC (GCN 40910).\n\nKW observed multiple overlapped emission episodes\nin in the time interval from ~12:40 to ~16:50 UT.\nThe emission is clearly visible in all three KW waiting mode\nenergy bands (20-75, 75-300, 300-1250 keV).\nFrom our preliminary background estimates,\nthe total duration of the event is >~15.5 ks.\nThe Konus-Wind light curve is available at\nhttp://www.ioffe.ru/LEA/GRBs/GRB250702BCDE/\n\nIn the 20-1250 keV range, the time-integrated spectrum of the emission is best described\nby a simple power law (PL) function with the PL photon index of (-1.3 ± 0.06).\nThe total observed fluence in this energy band is (5.95 ± 0.32)x10^-4 erg/cm^2\nand the 2.944 s peak energy flux is (5.33 ± 0.29)x10^-7 erg/cm^2/s.\n\nAll the quoted errors are estimated at the 68% confidence level.\nAll the presented results are preliminary.\n",
  "subject": "GRBs 250702B,C,D,E / EP250702a: Konus-Wind detection of a hard X-ray transient activity",
  "bibcode": "2025GCN.40914....1F",
  "createdOn": 1751547072339,
  "eventId": "EP250702a",
  "submittedHow": "email",
  "circularId": 40914
}