Timing Analysis of Unusual GRB 090709A Observed by Suzaku Wide-band All sky Monitor

2010 ◽  
Author(s):  
W. Iwakiri ◽  
M. Ohno ◽  
T. Kamae ◽  
Y. E. Nakagawa ◽  
Y. Terada ◽  
...  
Keyword(s):  
Timing Analysis ◽  
Wide Band ◽  
Sky Monitor

Development of the HXD-II wide-band all-sky monitor onboard Astro-E2

2005 ◽  
Vol 52 (6) ◽  
pp. 2765-2772 ◽  
Author(s):  
K. Yamaoka ◽  
M. Ohno ◽  
Y. Terada ◽  
S. Hong ◽  
J. Kotoku ◽  
...  
Keyword(s):  
Wide Band ◽  
Sky Monitor

scholarly journals Design and In-Orbit Performance of the Suzaku Wide-Band All-Sky Monitor

2009 ◽  
Vol 61 (sp1) ◽  
pp. S35-S53 ◽  
Author(s):  
Kazutaka Yamaoka ◽  
Akira Endo ◽  
Teruaki Enoto ◽  
Yasushi Fukazawa ◽  
Ryuji Hara ◽  
...  
Keyword(s):  
Wide Band ◽  
Sky Monitor

scholarly journals Sub-MeV band observation of a hard burst from AXP 1E 1547.0−5408 with the Suzaku Wide-band All-sky Monitor

2015 ◽  
Vol 67 (3) ◽  
pp. 41 ◽  
Author(s):  
Tetsuya Yasuda ◽  
Wataru B. Iwakiri ◽  
Makoto S. Tashiro ◽  
Yukikatsu Terada ◽  
Tomomi Kouzu ◽  
...  
Keyword(s):  
Wide Band ◽  
Sky Monitor

scholarly journals Spectral properties of gamma-ray bursts observed by the Suzaku wide-band all-sky monitor

2019 ◽  
Vol 71 (4) ◽  
Author(s):  
Norisuke Ohmori ◽  
Kazutaka Yamaoka ◽  
Makoto Yamauchi ◽  
Yuji Urata ◽  
Masanori Ohno ◽  
...  
Keyword(s):  
Short Duration ◽  
Power Law ◽  
Spectral Properties ◽  
Gamma Ray ◽  
Wide Band ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Sky Monitor ◽  
S Peak ◽  
Single Power

Abstract We have systematically studied the spectral properties of 302 localized gamma-ray bursts (GRBs) observed by the Suzaku wide-band all-sky monitor (WAM) from 2005 August to 2010 December. The energy spectra in the 100–5000 keV range integrated over the entire emission and the 1 s peak were fitted by three models: a single power law, a power law with an exponential cutoff (CPL), and the GRB Band function (GRB). Most of the burst spectra were well fitted by a single power law. The average photon index α was −2.11 and −1.73 for long and short bursts, respectively. For the CPL and GRB models, the low-energy and high-energy photon indices (α and β) for the entire emission spectra were consistent with previous measurements. The averages of the α and β were −0.90 and −2.65 for long-duration GRBs, while the average α was −0.55 and the β was not well constrained for short-duration GRBs. However, the average peak energy Epeak was 645 and 1286 keV for long- and short-duration GRBs respectively, which are higher than previous Fermi/GBM measurements (285 keV and 736 keV). The α and Epeak of the 1 s peak spectra were larger, i.e., the spectra were harder, than the total fluence spectra. Spectral simulations based on Fermi-GBM results suggest that the higher Epeaks measured by the Suzaku WAM could be due to detector selection bias, mainly caused by the limited energy range above 100 keV.

scholarly journals Wide-band profile domain pulsar timing analysis

2016 ◽  
Vol 466 (3) ◽  
pp. 3706-3727 ◽  
Author(s):  
L. Lentati ◽  
M. Kerr ◽  
S. Dai ◽  
M. P. Hobson ◽  
R. M. Shannon ◽  
...  
Keyword(s):  
Timing Analysis ◽  
Wide Band ◽  
Pulsar Timing ◽  
Band Profile

scholarly journals Long-Term X-ray Variability of Circinus X-1 as Observed by the RXTE All Sky Monitor

2003 ◽  
Vol 214 ◽  
pp. 218-219
Author(s):  
Junfeng Wang ◽  
W. N. Brandt
Keyword(s):  
Timing Analysis ◽  
Period Change ◽  
Light Curves ◽  
Data Set ◽  
X Ray ◽  
Low Mass ◽  
Sky Monitor ◽  
Radio Band ◽  
Over Time

The luminous low mass X-ray binary Cir X-1 has been observed nearly continuously for about 5 years by the X-ray All Sky Monitor on board the RXTE satellite. We carried out a timing analysis on Cir X-1 with the RXTE data. We define the period from the X-ray data, comparing the period change over time with the best current ephemeris. with folded light curves of entire data set, characteristics of the system like long-term lightcurve changes, behavior of flares and dips and super-Eddington accretion were obtained. We also checked and identified the secondary flaring reported in radio band with X-ray data.

scholarly journals Suzaku Wide-band All-sky Monitor (WAM) observations of GRBs and SGRs

2017 ◽  
Vol 69 (3) ◽  
Author(s):  
Kazutaka Yamaoka ◽  
Masanori Ohno ◽  
Makoto S. Tashiro ◽  
Kevin Hurley ◽  
Hans A. Krimm ◽  
...  
Keyword(s):  
Wide Band ◽  
Sky Monitor

scholarly journals Suzaku Wide-band All-sky Monitor – 10 Years history

2019 ◽  
Author(s):  
Masanori Ohno ◽  
Yasushi Fukazawa ◽  
Takafumi Kawano ◽  
Kazutaka Yamaoka ◽  
Makoto S. Tashiro ◽  
...  
Keyword(s):  
Wide Band ◽  
Sky Monitor

scholarly journals Spectral Evolutions Study of Gamma-Ray Burst Exponential Decays with Suzaku-WAM

2011 ◽  
Vol 7 (S279) ◽  
pp. 411-412
Author(s):  
Makoto S. Tashiro ◽  
Kaori Onda ◽  
Kazutaka Yamaoka ◽  
Masahiro Ohno ◽  
Satoshi Sugita ◽  
...  
Keyword(s):  
Exponential Decay ◽  
Gamma Ray ◽  
Thermal Emission ◽  
Wide Band ◽  
Light Curves ◽  
Emission Model ◽  
Spectral Evolution ◽  
Time Resolved ◽  
Gamma Ray Burst ◽  
Sky Monitor

AbstractAn observational study is presented of the spectral evolution of gamma-ray burst (GRB) prompt emissions with the Suzaku Wide-band All-sky Monitor (WAM). We selected 6 bright GRBs exhibiting 7 well-separated fast-rise-exponential-decay (FRED) shaped light curves to investigate spectral changes by evaluating exponential decay time constants of the energy-resolved light curves. In addition, we carried out time-resolved spectroscopy of two of them which were located with accuracy sufficient to evaluate the time-resolved spectra with precise energy response matrices. The two imply different emission mechanisms; the one is well reproduced with a cooling blackbody radiation model with a power-law component, while the other prefers non-thermal emission model with a decaying turn over energy.

Current Status of the Suzaku Wide-band All-sky Monitor (WAM)

2009 ◽  
Author(s):  
Kazutaka Yamaoka ◽  
Satoshi Sugita ◽  
Makoto Tashiro ◽  
Yukikatsu Terada ◽  
Yuji Urata ◽  
...  
Keyword(s):  
Wide Band ◽  
Current Status ◽  
Sky Monitor
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