TITLE: GCN CIRCULAR NUMBER: 14720 SUBJECT: Konus-Wind observation of GRB 130527A DATE: 13/05/29 14:11:48 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The long-duration intense hard-spectrum GRB 130527A (Swift-BAT trigger 556753: Gompertz et al., GCN 14703;) Baumgartner et al., GCN 14708) triggered Konus-Wind at T0=51688.300s UT (14:21:28.300). The light curve shows a bright hard multi-peaked emission complex from ~T0 s to ~T0+10s, followed by the weaker and softer emission out to ~T0+40s. The emission is seen up to 10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB130527_T51688/ As observed by Konus-Wind, the burst had a fluence of (1.1 ± 0.05)x10-4 erg/cm2, and a 64-ms peak flux, measured from T0+3.200s, of (5.0 ± 0.3)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum (measured from T0 to T0+38.656 s) is best fit in the 50 keV - 15 MeV range by the cutoff power law model with the following parameters: the photon index alpha = -1.04 ± 0.04, the peak energy Ep = 1380 ± 120 keV, chi2 = 96/90 dof. The spectrum at the maximum count rate (measured from T0+0.256 to T0+5.888 s) is best fit in the 50 keV - 15 MeV range by the GRB (Band) function with the following model parameters: by the cutoff power law model with the following parameters: the photon index alpha = -0.97 ± 0.04, the peak energy Ep = 1429 ± 84 keV, chi2 = 72/79 dof. All the quoted results are preliminary.