TITLE: GCN CIRCULAR NUMBER: 6671 SUBJECT: Konus-Wind observation of GRB 070724B DATE: 07/07/26 15:32:31 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and T. Cline on behalf of the Konus-Wind team report: The long soft GRB 070724B localized by SuperAGILE (Feroci et al., GCN 6668), triggered Konus-Wind at T0=84307.346 s UT (23:25:07.346). The Konus-Wind light curve shows the main multipeaked pulse with a total duration of ~50 s followed by a weak pulse at T-T0 ~102 sec with a duration of ~10 s. As observed by Konus-Wind the burst had a fluence of 1.80(-0.25, +0.04)x10^-5 erg/cm2, and a 64-ms peak flux measured from T0+29.744 s 2.17(-0.45, +0.34)x10^-6 erg/cm2/s (both in the 20 - 500 keV energy range). The time-integrated spectrum of the burst (from T0 to T0+49.408 s) can be fitted (in the 20 - 500 keV range) by a power law with exponential cutoff model: dN/dE ~ E^(-alpha)*exp(-E*(2-alpha)/Ep) with alpha = 1.15 +/- 0.13 and Ep = 82 +/- 5 keV (chi2 = 40/42 dof). All the quoted errors are at the 90% confidence level. The Konus-Wind light curve of this GRB is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB070724_T84307/