845 citations · 2.3k across the 47 of their papers we have counts for
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Time-evolution of Peak Energy and Luminosity Relation within Pulses for GRB 061007: Probing Fireball Dynamics
Masanori Ohno, Kunihito Ioka, Kazutaka Yamaoka +3
We perform a time-resolved spectral analysis of bright, long Gamma-ray burst GRB 061007 using Suzaku/WAM and Swift/BAT. Thanks to the large effective area of the WAM, we can invest…
Intrinsic properties of a complete sample of HETE-2 gamma-ray bursts. A measure of the GRB rate in the Local Universe
A. Pélangeon, J. -L. Atteia, Y. E. Nakagawa +32
Aims: Taking advantage of the forthcoming Catalog of the HETE-2 mission, the aim of this paper is to evaluate the main properties of HETE-2 GRBs - the E_peak, the T_90 and the E_is…
Suzaku Observations of SGR 1900+14 and SGR 1806-20
Yujin E. Nakagawa, Tatehiro Mihara, Atsumasa Yoshida +8
Spectral and timing studies of Suzaku ToO observations of two SGRs, 1900+14 and 1806-20, are presented. The X-ray quiescent emission spectra were well fitted by a two blackbody fun…
The Swift Discovery of X-ray Afterglows Accompanying Short Bursts from SGR 1900+14
Y. E. Nakagawa, T. Sakamoto, G. Sato +3
The discovery of X-ray afterglows accompanying two short bursts from SGR 1900+14 is presented. The afterglow luminosities at the end of each observation are lower by 30-50% than th…
Status of GRB Observations with the Suzaku Wideband All-sky Monitor
M. S. Tashiro, Y. Terada, Y. Urata +28
The Wide-band All-sky Monitor (WAM) is a function of the large lateral BGO shield of the Hard X-ray Detector (HXD) onboard Suzaku. Its large geometrical area of 800 cm^2 per side,…
Multiple Component Analysis of Time Resolved Spectra of GRB041006: A Clue to the Nature of Underlying Soft Component of GRBs
Yuji Shirasaki, Atsumasa Yoshida, Nobuyuki Kawai +30
GRB 041006 was detected by HETE-2 at 12:18:08 UT on 06 October 2004. This GRB displays a soft X-ray emission, a precursor before the onset of the main event, and also a soft X-ray…
Suzaku Observation of the Anomalous X-ray Pulsar CXOU J164710.2--455216
Sachindra Naik, Tadayasu Dotani, Nobuyuki Kawai +11
Suzaku TOO observation of the anomalous X-ray pulsar CXOU J164710.2-455216 was performed on 2006 September 23--24 for a net exposure of 38.8 ks. During the observation, the XIS was…
Swift captures the spectrally evolving prompt emission of GRB 070616
R. L. C. Starling, P. T. O'Brien, R. Willingale +14
The origins of Gamma-ray Burst prompt emission are currently not well understood and in this context long, well-observed events are particularly important to study. We present the…
Observations of the Prompt Gamma-Ray Emission of GRB 070125
Eric C. Bellm, Kevin Hurley, Valentin Pal'shin +17
The long, bright gamma-ray burst GRB 070125 was localized by the Interplanetary Network. We present light curves of the prompt gamma-ray emission as observed by Konus-WIND, RHESSI,…
Uniting the Quiescent Emission and Burst Spectra of Magnetar Candidates
Yujin E. Nakagawa, Atsumasa Yoshida, Kazutaka Yamaoka +1
Spectral studies of quiescent emission and bursts of magnetar candidates using XMM-Newton, Chandra and Swift data are presented. Spectra of both the quiescent emission and the burs…
Spectral evolution of GRB 060904A observed with Swift and Suzaku -- Possibility of Inefficient Electron Acceleration
Daisuke Yonetoku, Sachiko Tanabe, Toshio Murakami +39
We observed an X-ray afterglow of GRB 060904A with the Swift and Suzaku satellites. We found rapid spectral softening during both the prompt tail phase and the decline phase of an…
HETE-2 Observations of the X-Ray Flash XRF 040916
Makoto Arimoto, Nobuyuki Kawai, Atsumasa Yoshida +43
A long X-ray flash was detected and localized by the instruments aboard the High Energy Transient Explorer II (HETE-2) at 00:03:30 UT on 2004 September 16. The position was reporte…
A Comprehensive Study of Short Bursts from SGR 1806-20 and SGR 1900+14 Detected by HETE-2
Yujin E. Nakagawa, Atsumasa Yoshida, Kevin Hurley +20
We present the results of temporal and spectral studies of the short burst (less than a few hundred milliseconds) from the soft gamma repeaters (SGRs) 1806-20 and 1900+14 using the…
Discovery of a New X-Ray Burst/Millisecond Accreting Pulsar HETE J1900.1-2455
M. Suzuki, N. Kawai, T. Tamagawa +16
A class of low-mass X-ray binary sources are known to be both X-ray burst sources and millisecond pulsars at the same time. A new source of this class was discovered by High Energy…
X-ray Flashes or soft Gamma-ray Bursts? The case of the likely distant XRF 040912
G. Stratta, S. Basa, N. Butler +49
In this work, we present a multi-wavelength study of XRF 040912, aimed at measuring its distance scale and the intrinsic burst properties. We performed a detailed spectral and temp…
Swift and Suzaku Observations of the X-Ray Afterglow from the GRB 060105
M. S. Tashiro, K. Abe, L. Angelini +34
Results are presented of early X-ray afterglow observations of GRB 060105 by Swift and Suzaku. The bright, long gamma-ray burst GRB 060105 triggered the Swift Burst Alert Telescope…
Cyclotron resonance energies at a low X-ray luminosity: A0535+262 observed with Suzaku
Y. Terada, T. Mihara, M. Nakajima +28
The binary X-ray pulsar A0535+262 was observed with the Suzaku X-ray observatory, on 2005 September 14 for a net exposure of 22 ksec. The source was in a declining phase of a minor…
HETE-2 Localizations and Observations of Four Short Gamma-Ray Bursts: GRBs 010326B, 040802, 051211 and 060121
T. Q. Donaghy, D. Q. Lamb, T. Sakamoto +34
Here we report the localizations and properties of four short-duration GRBs localized by the High Energy Transient Explorer 2 satellite (HETE-2): GRBs 010326B, 040802, 051211 and 0…
GRB 060121: Implications of a Short/Intermediate Duration Gamma-Ray Burst at High Redshift
A. de Ugarte Postigo, A. J. Castro-Tirado, S. Guziy +23
Since the discovery of the first short-hard gamma-ray burst afterglows in 2005, the handful of observed events have been found to be embedded in nearby (z < 1), bright underlying g…
An Optically Dark GRB Observed by HETE-2: GRB 051022
Yujin E. Nakagawa, Atsumasa Yoshida, Satoshi Sugita +33
GRB 051022 was detected at 13:07:58 on 22 October 2005 by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contains multi…
HETE-2 Localization and Observations of the Gamma-Ray Burst GRB 020813
R. Sato, the HETE Science Team
A bright, long gamma-ray burst (GRB) was detected and localized by the instruments on board the High Energy Transient Explorer 2 satellite (HETE-2) at 02:44:19.17 UTC (9859.17 s UT…
Discovery of the short gamma-ray burst GRB 050709
J. S. Villasenor, D. Q. Lamb, G. R. Ricker +30
Gamma-Ray Bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in…
Design and Performance of the Wide-Field X-Ray Monitor on Board the High-Energy Transient Explorer 2
Y. Shirasaki, N. Kawai, A. Yoshida +18
The Wide-field X-ray Monitor (WXM) is one of the scientific instruments carried on the High Energy Transient Explorer 2 (HETE-2) satellite launched on 2000 October 9. HETE-2 is an…