Suzaku WAM detections of the current activities from AXP 1E1547.0-5408
ATel #1906; 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
on 23 Jan 2009; 17:20 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Kazutaka Yamaoka (yamaoka@phys.aoyama.ac.jp)
Subjects: Gamma Ray, Request for Observations, Neutron Star, Transient, Pulsar
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.html
Among them, following five events were detected with the Suzaku WAM
on-board 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.html
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Trigger Time (UT) T90 duration (s)
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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
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Spectral analyses are now in progress.
