{
  "bibcode": "2015GCN.17794....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 150430A\n(Swift/BAT detection: D'Elia et al., GCN Circ. 17789;\nMAXI/GSC detection: Fujita et al., GCN Circ. 17791;\nFermi/GBM detection: Roberts and Younes, GCN Circ. 17793)\ntriggered Konus-Wind at T0=1271.466 s UT (00:21:11.466).\n\nThe burst light curve shows three well separated emission episodes:\na weak episode at T-T0 ~ -320 s, the main episode at T-T0 ~ 0 s,\nand a weak episode at T-T0 ~ 100 s.\nThe total burst duration is about 420 s.\nThere is a hint of soft precursor at T-T0 ~ -440 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/GRB150430_T01271/\n\nAs observed by Konus-Wind, the burst\nhad a fluence of 2.95(-0.75,+1.14)x10^-5 erg/cm2,\nand a 256-ms peak flux, measured from T0+1.248 s,\nof 4.11(-1.02,+1.09)x10^-6 erg/cm2/s\n(both in the 20 keV - 10 MeV energy range).\n\nThe time-averaged spectrum of the main episode\n(measured from T0 to T0+114.944 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 = -0.79(-0.69,+1.48),\nthe high energy photon index beta = -2.21(-0.66,+0.33),\nthe peak energy 157(-70,+93) keV\n(chi2 = 69/72 dof)\n\nThe spectrum near the maximum count rate\n(measured from T0+0.000 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 = -0.47(-0.35,+0.45),\nthe high energy photon index beta = -2.11(-0.24,+0.16),\nthe peak energy 194(-38,+54) keV\n(chi2 = 80/97 dof)\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 17794,
  "createdOn": 1430404735000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "Konus-Wind observation of GRB 150430A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 150430A"
}