TITLE: GCN CIRCULAR NUMBER: 43701 SUBJECT: Konus-Wind detection of GRB 260127B DATE: 26/02/11 17:39:39 GMT FROM: Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru> D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia, A. Tsvetkova, M. Ulanov, and T. Cline on behalf of the Konus-Wind team, report: The short-duration GRB 260127B (Fermi-GBM detection: The Fermi GBM team, GCN 43533; Trigg, GCN 43573; IPN triangulation: Ridnaia et al., GCN 43559; AstroSat-CZTI detection: ,GCN 43576; GECAM-B observation: Ren et al., GCN 43597; Insight-HXMT/HE detection: Ren et al., GCN 43598) triggered Konus-Wind at T0=72154.163 s UT (20:02:34.163). The burst light curve shows a multipeaked structure, which starts at ~T0-0.1 s and has a total duration of ~0.3 s. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB260127_T72154/ As observed by Konus-Wind, the burst had a fluence of 2.09(-0.27,+0.38)x10^-6 erg/cm2, and a 16-ms peak flux, measured from T0+0.062 s, of 1.80(-0.40,+0.51)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+0.128 s) is best fit in the 20 keV - 1.3 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.21(-0.27,+0.31) and Ep = 796(-151,+261) keV (chi2 = 24/25 dof). All the quoted errors are at the 68% confidence level. All the quoted values are preliminary. View this GCN Circular online at https://gcn.nasa.gov/circulars/43701. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...