TITLE: GCN CIRCULAR NUMBER: 14688 SUBJECT: GRB 130515A: Suzaku WAM observation of the prompt emission DATE: 13/05/21 14:13:58 GMT FROM: Masanori Ohno at Hiroshima U W. Iwakiri(RIKEN), M. Tashiro, Y. Terada, T. Yasuda, Y. Ishida, H. Ueno, S. Sugimoto (Saitama U.), M. Ohno, K. Takaki, T. Kawano, R. Nakamura, S. Furui, Y. Fukazawa (Hiroshima U.), M. Yamauchi, N. Ohmori, M. Akiyama (Univ. of Miyazaki), K. Yamaoka (Nagoya U.), S. Sugita (Ehime U.), Y. E. Nakagawa, M. Kokubun, T. Takahashi (ISAS/JAXA), Y. Hanabata (ICRR), Y. Urata (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo) on behalf of the Suzaku WAM team, report: The short GRB 130515A (Swift/BAT trigger #555880 ; Malesani et al., GCN 14650; Barthelmy et al., GCN 14658; Fermi-GBM detection: Jenke, GCN 14663; Konus-Wind detection : Golenetskii et al., GCN 14668) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at UT 01:21:17.679 (=T0). The observed light curve shows a single peak starting at T0+0.1 s, ending at T0+0.4 s with a duration (T90) of about 0.25 seconds. The fluence in 100 - 1000 keV was 1.48 (+1.67 / -0.99) x 10-6 erg/cm2. The 1-s peak flux measured from T0+0 s was 1.4 (+0.4/-0.8) photons/cm2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0+0 s to T0+0.5 s is well fitted by a single power-law with a photon index of 2.17 (+0.53/-0.36) (chi2/d.o.f = 36.6/25). All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included. The light curves for this burst are available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html