TITLE: GCN CIRCULAR NUMBER: 32439 SUBJECT: Konus-Wind detection of GRB 220730A (short) DATE: 22/08/02 16:48:45 GMT FROM: Dmitry Frederiks at Ioffe Institute D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The short GRB 220730A (Swift detection: Dichiara et al., GCN Circ 32431; Swift-BAT refined analysis: Markwardt et al., GCN Circ 32438; Fermi GBM detection: Poolakkil & Meegan, GCN Circ 32437) triggered Konus-Wind (KW) at T0=56937.381 s UT (15:48:57.381). The burst light curve shows a single emission pulse which starts at ~T0-0.032 s and has a duration of ~0.1 s. The emission is seen up to ~2 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB220730_T56937/ As observed by Konus-Wind, the burst had a total fluence of (1.20 ± 0.38)x10^-6 erg/cm^2 and a 16-ms peak energy flux, measured from T0, of (1.62 ± 0.51)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range). The spectrum of the burst (measured from T0 to T0+0.064 s) is best fit in the 20 keV - 15 MeV range by a power law with exponential cutoff (CPL) model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.14(-0.34,+0.40) and Ep = 369(-59,+92) keV (pgstat = 50/54 dof). A Band function fits the spectrum equally well with alpha = -0.08 (-0.36,+0.42), beta = -2.61(-1.33, + 0.45), and Ep = 347 (-54, +86) keV (pgstat = 48/53 dof). All the quoted errors are estimated at the 68% confidence level. All the presented results are preliminary.