TITLE: GCN CIRCULAR NUMBER: 14249 SUBJECT: GRB 130216B: Suzaku WAM observation of the prompt emission DATE: 13/02/22 05:17:37 GMT FROM: Makoto Tashiro at Saitama U/Swift T. Yasuda, M. Tashiro, Y. Terada, W. Iwakiri, K. Takahara, M. Asahina, S. Kobayashi, A. Sakamoto, Y. Ishida, H. Ueno, S. Sugimoto (Saitama U.), M. Akiyama, N. Ohmori, E. Mochinaga, M. Yamauchi (Univ. of Miyazaki), K. Yamaoka, M. Kokubun, T. Takahashi (ISAS/JAXA), Y. Hanabata, T. Kawano, K. Takaki, R. Nakamura, Y.Tanaka, M. Ohno, Y. Fukazawa (Hiroshima U.), S. Sugita (Nagoya U.), Y. E. Nakagawa (Waseda U.), Y. Urata, P. Tsai (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo), on behalf of the Suzaku WAM team, report: The GRB 130216B (Cummings 2013, GCN 14226) was triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2013/02/16 18:58:13.41 UT (=T0). The observed light curve shows a double-peaked structure starting at T0-3.0 s and ending at T0+4.5 s with a duration (T90) of about 7.44 seconds. The fluence in 100 - 1000 keV was 1.81 (+0.21/-0.35) x 10^-6 erg/cm^2. The 1-s peak flux measured from T0 was 2.62 (+0.46/-0.62) photons/cm^2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0-1.0 s to T0+6.5 s is well fitted by a single power-law with a photon index of 2.93 (+0.68/-0.35) (chi^2/d.o.f = 12.5/14). The light curves for this burst will be available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html