TITLE: GCN CIRCULAR NUMBER: 8845 SUBJECT: AXP 1E1547.0-5408: Suzaku WAM detections of the current activity DATE: 09/01/23 15:56:03 GMT FROM: Kazutaka Yamaoka at Aoyama Gakuin U Y. Terada, M. Tashiro, Y. Urata, A. Endo, K. Onda, N. Kodaka, K. Morigami, T. Sugasahara, W. Iwakiri (Saitama U.), M. Ohno, M. Kokubun, M. Suzuki, T. Takahashi (ISAS/JAXA), K. Yamaoka, S. Sugita (Aoyama Gakuin U.), T. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo), Y.E. Nakagawa, T. Tamagawa (RIKEN), T. Uehara, T. Takahashi, Y. Fukazawa, C. Kira, Y. Hanabata (Hiroshima U.), E. Sonoda, M. Yamauchi, H. Tanaka, R. Hara, N. Ohmori, K. Kono, H. Hayashi, (Univ. of Miyazaki), S. Hong (Nihon U.), N. Vasquez (Tokyo Tech), on behalf of the Suzaku WAM team, report: The Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV detected the current burst activities most likely arising from the AXP 1E1547.0-5408, as reported by Swift BAT (Gronwall et al., GCN 8833), INTEGRAL SPI-ACS (Savchenko et al., GCN 8837) and Fermi GBM (Connaughton et al., GCN 8835). Over a period of January 21 23:49:41 - January 22 23:47:00 (UT), the WAM detected about 250 bursts with durations of less than 5 seconds above 5.5 sigma. The most intense event with a T90 duration of 5 seconds was observed on 2009-01-22 08:17:28 (UT), and also detected by INTEGRAL SPI-ACS (Mereghetti et al., GCN 8841). The light curves with 1 sec time resolution for all these bursts are available at the following URL: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/sgraxp/untrig/sgraxp_table_2009.html Among them, following five events were detected with the Suzaku WAM onboard triggering system, and their finer time resolution light curves (1/64 sec time resolution) are available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/sgraxp/trig/sgraxp_table_2009.html -------------------------------------------------------------------------- Trigger Time (UT) T90 duration (s) -------------------------------------------------------------------------- 2009-01-22 01:28:59 0.14 2009-01-22 02:46:56 1.5 2009-01-22 04:34:52 0.41 (the first event) 2.0 (the second event including its precursor) 2009-01-22 15:10:34 0.13 2009-01-22 17:02:55 0.36 -------------------------------------------------------------------------- Spectral analyses are now in progress, and results will be reported later.