{
  "bibcode": "2015GCN.17870....1G",
  "body": "S. Golenetskii, R. Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik,\nM. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline\non behalf of the Konus-Wind team, report:\n\nThe long-duration GRB 150523A\n(Fermi-GBM detection: Yu, GCN Circ. 17863;\nFermi-LAT detection: Bissaldi, et al., GCN Circ. 17864)\ntriggered Konus-Wind at T0=34189.641 s UT (09:29:49.641).\n\nThe burst light curve consists of two pulses\nwith a total duration of ~36 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/GRB150523_T34189/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 4.44(-0.69,+0.71)x10^-5 erg/cm2,\nand a 64-ms peak flux, measured from T0+31.792 s,\nof 5.52(-1.52,+1.53)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+41.216 s)\nis best fit in the 20 keV - 12 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.31(-0.14,+0.16),\nthe high energy photon index beta = -2.66(-0.99,+0.32),\nthe peak energy 399(-42,+52) keV\n(chi2 = 94/97 dof)\n\nThe spectrum near the maximum count rate\n(measured from T0+24.832 to T0+33.024 s)\nis best fit in the 20 keV - 12 MeV range\nby the GRB (Band) model with the following parameters:\nthe low-energy photon index alpha = -0.35(-0.15,+0.17),\nthe high energy photon index beta = -2.66(-1.35,+0.34),\nthe peak energy 389(-48,+58) keV\n(chi2 = 104/97 dof)\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 17870,
  "createdOn": 1432558030000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 150523A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 150523A"
}