TITLE: GCN CIRCULAR NUMBER: 6593 SUBJECT: GRB 070626: Suzaku/WAM observation of the prompt emission DATE: 07/07/04 13:48:52 GMT FROM: Kazutaka Yamaoka at Aoyama Gakuin U Y. Terada, T. Tamagawa (RIKEN), M. Ohno, T. Uehara, T. Takahashi, Y. Fukazawa, C. Kira (Hiroshima U.), K. Yamaoka, Y. E. Nakagawa, S. Sugita (Aoyama Gakuin U.), K. Morigami, N. Kodaka, K. Onda, M. Tashiro, M. Suzuki, Y. Urata, A. Endo (Saitama U.), T. Enoto, R. Miyawaki, K. Nakazawa, K. Makishima (Univ. of Tokyo), E. Sonoda, M. Yamauchi, S. Maeno, H. Tanaka, R. Hara (Univ. of Miyazaki), M. Kokubun, M. Suzuki, T. Takahashi (ISAS/JAXA), S. Hong (Nihon U.), on behalf of the Suzaku WAM team, report: The long burst, GRB 070626 (S. Golenetskii et al. GCN 6592) was detected at 2007-06-26 04:07:30 UT (= T0) with the Suzaku Wide-band All-sky Monitor (WAM), which covers an energy range of 50 keV - 5 MeV. The burst continues from T= T0-120 sec to T0+210 sec, as already reported on GCN 6592. The object position reported by GCN 6592 corresponds to the incident angle of (theta, phi) = (103 deg, 169 deg) to the HXD WAM, where the energy response is well calibrated. The fluence in the 100 -- 1000 keV energy band was 2.25(+- 0.01) x 10^-4 erg/cm2, and the 1-sec peak flux was 19.5 +/- 0.2 photons/cm^2/sec in the same energy range. According to preliminary analyses, the time averaged spectrum from T0 to T0+190 sec in the 120 keV to 2.0 MeV energy band can be reproduced by the Band function (Band et al. 1993, ApJ 413, p281) with the following parameters; alpha = -1.55 +/- 0.05, beta = -2.15 +/- 0.05, and Epeak = 600 +/- 50 keV. All the quoted errors are at the 90% confidence level, while systematic errors are not included. Since the on-board trigger system was disabled at the time of T0, no BST mode data with a time resolution of 15.625 msec is available, and the spectral analyses were performed by the continuous monitoring (TRN) data with the 1 sec resolution. The light curve data with 1 sec resolution will be appeared at the web site http://www.astro.isas.ac.jp/suzaku/HXD-WAM/WAM-GRB/grb/untrig/grb_table.html