{
  "bibcode": "2020GCN.27715....1R",
  "body": "A. Ridnaia, S. Golenetskii, R. Aptekar, D. Frederiks,\nM. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline\non behalf of the Konus-Wind team, report:\n\nTwo bright, short bursts from SGR 1935+2154\n(IPN triangulation: Hurley et al., GCN Circ. 27714)\ntriggered Konus-Wind at 22322.624 s UT (06:12:02.624)\nand 78677.28 s UT (21:51:17.280) on 2020 May 10.\n\nThe first burst light curve shows a single, very bright pulse\nstarted with a sharp rise and then smoothly decayed\nto the background level. The second burst light curve shows two\npulses separated by a ~0.15 s gap.\nBoth bursts have a total duration of ~0.4 s.\nThe emission is seen up to ~500 keV.\n\nAs measured by KW, the burst fluences and peak fluxes are as follows:\n------------------------------------------------------------------\n#  Date       T0(KW) s UT                   Fl*           PF**\n------------------------------------------------------------------\n1 20200510 22322.624 s UT(06:12:02.624)  8.70 +/-0.22  38.9 +/-2.0\n2 20200510 78677.280 s UT(21:51:17.280)  2.44 +/-0.10  17.8 +/-1.5\n------------------------------------------------------------------\n*  -  Fluence (20-200 keV) in units of 1e-6 erg/cm2\n\n** - Peak Flux (20-200 keV) on 16-ms time scale\n        in units of 1e-6 erg/cm2/s\n\nThe time-averaged spectra of the bursts are well fit\nby a power law with exponential cutoff model:\ndN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)\nwith the following parameters:\n-------------------------------------------------------------\n#   Tbeg-Tend         alpha            Ep(keV)    chi2/dof\n-------------------------------------------------------------\n1   0 - 0.256    0.08(-0.23,+0.24)    47(-2,+2)     56/25\n2   0 - 0.256    0.49(-0.65,+0.71)    37(-3,+2)     39/24\n-------------------------------------------------------------\n\nThe Konus-Wind light curves of the bursts are available at\nhttp://www.ioffe.ru/LEA/SGRs/200510_T22322/\nhttp://www.ioffe.ru/LEA/SGRs/200510_T78677/\n\nAll the quoted errors are at the 90% confidence level.\nAll the quoted values are preliminary.",
  "circularId": 27715,
  "createdOn": 1589217102000,
  "email": "ridnaia@mail.ioffe.ru",
  "subject": "Konus-Wind observation of SGR 1935+2154 activity on 2020 May 10",
  "submitter": "Anna Ridnaia at Ioffe Institute  <ridnaia@mail.ioffe.ru>",
  "eventId": "SGR 1935+2154"
}