Development of Thick-foil and Fine-pitch GEMs with a Laser Etching Technique (2009)
Tamagawa, T., Hayato, A., Asami, F., Abe, K., Iwamoto, S., Nakamura, S., ...
We have produced thick-foil and fine-pitch gas electron multipliers (GEMs) using a laser etching technique. To improve production yield we have employed a new material, Liquid Crystal Polymer,...
Tamura, Takayuki, Maeda, Y., Mitsuda, K., Fabian, A. C., Sanders, J. S., Furuzawa, A., ...
The results from Suzaku observations of the central region of the Perseus cluster are presented. Deep exposures with the X-ray Imaging Spectrometer provide high quality X-ray spectra from the...
Search for Sc-K line emission from RX J0852.0--4622 Supernova remnant with Suzaku (2009)
Hiraga, Junko S., Kobayashi, Y., Tamagawa, T., Hayato, A., Bamba, A., Terada, Y., ...
We searched for evidence of line emission around 4keV from the northwestern rim of the supernova remnant RX J0852.0-4622 using Suzaku XIS data. Several papers have reported the detection of an...
Doppler-Broadened Iron X-ray Lines from Tycho's Supernova Remnant (2009)
Furuzawa, A., Ueno, D., Hayato, A., Ozawa, M., Tamagawa, T., Bamba, A., ...
We use \suzaku observations to measure the spatial variation of the Fe K$\alpha$ line with radius in the \tycho supernova remnant. The Fe line widths show a significant decrease from a FWHM value of...
Pélangeon, A., Nakagawa, Y. E., Hurley, K., Yoshida, A., Vanderspek, R., ...
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_iso - in their source...
Suzaku Observations of Tycho's Supernova Remnant (2008)
Tamagawa, T., Hayato, A., Nakamura, S., Terada, Y., Bamba, A., Hiraga, J. S., ...
Tycho's supernova remnant was observed by the XIS and HXD instruments onboard the Suzaku satellite on 2006 June 26-29 for 92 ks. The spectrum up to 30 keV was well fitted with a two-component model,...
Status of GRB Observations with the Suzaku Wideband All-sky Monitor (2008)
Tashiro, M. S., Terada, Y., Urata, Y., Onda, K., Kodaka, N., Endo, A., ...
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, the large stopping...
Pélangeon, A., Nakagawa, Y. E., Hurley, K., Yoshida, A., Vanderspek, R., ...
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_iso - in their source...
Pélangeon, A., Nakagawa, Y. E., Hurley, K., Yoshida, A., Vanderspek, R., ...
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_iso - in their source...
Very early multi-color observations of the plateau phase of GRB 041006 afterglow (2006)
Urata, Y., Huang, K. Y., Qiu, Y. L., Hu, J., Kuo, P. H., Tamagawa, T., ...
Observations of the optical afterglow of GRB 041006 with the Kiso Observatory 1.05 m Schmidt telescope, the Lulin Observatory 1.0 m telescope and the Xinglong Observatory 0.6 m telescope. Three-bands...
Postigo, A De Ugarte, Fatkhullin, T. A., Johannesson, G., Gorosabel, J., Sokolov, V. V., Castro-Tirado, A. J., ...
Aims. Understand the shape and implications of the multiband light curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the...
Discovery of a New X-Ray Burst/Millisecond Accreting Pulsar HETE J1900.1-2455 (2006)
Suzuki, M., Kawai, N., Tamagawa, T., Yoshida, A., Nakagawa, Y. E., Tanaka, K., ...
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 Transient Explorer...
Multi-color Shallow Decay and Chromatic Breaks in the GRB 050319 Optical Afterglow (2006)
Huang, K. Y., Urata, Y., Kuo, P. H., Ip, W. H., Ioka, K., Aoki, T., ...
Multi-wavelength B, V, R, I observations of the optical afterglow of GRB 050319 were performed by the 1.05-m telescope at Kiso Observatory and the 1.0-m telescope at Lulin Observatory from 1.31 hours...
In-Orbit Performance of the Hard X-ray Detector on board Suzaku (2006)
Kokubun, M., Makishima, K., Takahashi, T., Murakami, T., Tashiro, M., Fukazawa, Y., ...
The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board the X-ray astronomy satellite Suzaku are described. Its basic performances, including a wide energy bandpass of...
Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313 (2006)
Mizuno, T., Miyawaki, R., Ebisawa, K., Kubota, A., Miyamoto, M., Winter, L., ...
Two ultraluminous X-ray sources (ULXs) in the nearby Sb galaxy NGC 1313, named X-1 and X-2, were observed with Suzaku on 2005 September 15. During the observation for a net exposure of 28~ks (but...
X-ray Flashes or soft Gamma-ray Bursts? The case of the likely distant XRF 040912 (2006)
Stratta, G., Basa, S., Butler, N., Atteia, J. L., Gendre, B., Pelangeon, A., ...
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 temporal analysis of...
Swift and Suzaku Observations of the X-Ray Afterglow from the GRB 060105 (2006)
Tashiro, M. S., Abe, K., Angelini, L., Barthelmy, S., Gehrels, N., Ishikawa, N., ...
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 (BAT) at 06:49:28...
Butler, N. R., Li, W., Perley, D., Huang, K. Y., Urata, Y., Prochaska, J. X., ...
Even with the renaissance in gamma-ray burst (GRB) research fostered by the Swift satellite, few bursts have both contemporaneous observations at long wavelengths and exquisite observations at later...
Donaghy, T. Q., Lamb, D. Q., Sakamoto, T., Norris, J. P., Nakagawa, Y., Villasenor, J., ...
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 060121, all of which...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2006)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
Afterglow spectrum of a gamma-ray burst with the highest known redshift z=6.295 (2005)
Kawai, N., Kosugi, G., Aoki, K., Yamada, T., Totani, T., Ohta, K., ...
Gamma-ray bursts (GRBs) and their afterglows have been proposed as an excellent probe to study the evolution of cosmic star formation, the reionization of the intergalactic medium, and the metal...
Discovery of the short gamma-ray burst GRB 050709 (2005)
Villasenor, J. S., Lamb, D. Q., Ricker, G. R., Kawai, N., Butler, N., ...
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 star-forming...
Discovery of the short gamma-ray burst GRB 050709 (2005)
Villasenor, J. S., Lamb, D. Q., Ricker, G. R., Kawai, N., Butler, N., ...
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 starforming...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2005)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
Optical Afterglow Observations of the Unusual Short-Duration Gamma-Ray Burst 040924 (2005)
Huang, K. Y., Urata, Y., Filippenko, A. V., Hu, J. H., Ip, W. H., Kuo, P. H., ...
The 1-m telescope at Lulin Observatory and the 0.76-m Katzman Automatic Imaging Telescope at Lick Observatory were used to observe the optical afterglow of the short-duration (1.2--1.5 s) gamma-ray...
The search for optical emission on and before the GRB trigger with the WIDGET telescope (2005)
Tamagawa, T., Usui, F., Urata, Y., Abe, K., Onda, K., Tashiro, M., ...
WIDGET is a robotic telescope for monitoring the HETE-2 field-of-view to detect Gamma-ray Burst optical flashes or possible optical precursors. The system has 62degx62deg wide field-of-view which...
Kiso observations for 20 GRBs in HETE-2 era (2005)
Urata, Y., Nakada, Y., Miyata, T., Aoki, T., Soyano, T., Tarusawa, K., ...
We have established a GRB follow-up observation system at Kiso observatory (Japan) in 2001. Since the east Asian area had been blank for the GRB follow-up observational network, this observational...
GRBs Optical follow-up observation at Lulin observatory, Taiwan (2005)
Huang, K. Y., Urata, Y., Ip, W. H., Tamagawa, T., Onda, K., Makishima, K.
The Lulin GRB program, using the Lulin One-meter Telescope (LOT) in Taiwan started in July 2003. Its scientific aims are to discover optical counterparts of XRFs and short and long GRBs, then to...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
HETE-2 Observation of two gamma-ray bursts at z > 3 (2005)
Kawai, N., Vanderspek, R., Pizzichini, G., Ricker, G. R., Barraud, C., ...
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these two gamma-ray...
Wide band X-ray Imager (WXI) and Soft Gamma-ray Detector (SGD) for the NeXT Mission (2004)
Takahashi, T., Awaki, A., Dotani, T., Fukazawa, Y., Hayashida, K., Kamae, T., ...
The NeXT mission has been proposed to study high-energy non-thermal phenomena in the universe. The high-energy response of the super mirror will enable us to perform the first sensitive imaging...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2004)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
High Energy Observations of XRF 030723: Evidence for an Off-axis Gamma-Ray Burst? (2004)
Butler, N. R., Sakamoto, T., Suzuki, M., Kawai, N., Lamb, D. Q., Graziani, C., ...
We report High Energy Transient Explorer 2 (HETE-2) Wide Field X-ray Monitor/French Gamma Telescope observations of XRF030723 along with observations of the XRF afterglow made using the 6.5m Magellan...
Vanderspek, R., Sakamoto, T., Barraud, C., Tamagawa, T., Graziani, C., Suzuki, M., ...
An exceptionally intense gamma-ray burst, GRB030329, was detected and localized by the instruments on board the High Energy Transient Explorer satellite (HETE) at 11:37:14 UT on 29 March 2003. The...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2004)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
Global Characteristics of X-Ray Flashes and X-Ray-Rich GRBs Observed by HETE-2 (2004)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We describe and discuss the global properties of 45 gamma-ray bursts (GRBs) observed by HETE-2 during the first three years of its mission, focusing on the properties of X-Ray Flashes (XRFs) and...
GRB 020531: A Short, Hard Gamma-Ray Burst Localized and Observed by HETE-2 (2003)
Lamb, D. Q., Ricker, G. R., Hurley, K., Kawai, N., Shirasaki, Y., ...
The HETE-2 FREGATE and WXM instruments detected a short, hard GRB at 00:26:18.72 UT on 31 May 2002. A preliminary localization was reported as a GCN Position Notice 88 min after the burst, and a...
Urata, Y., Miyata, T., Nishiura, S., Tamagawa, T., Burenin, R. A., Sekiguchi, T., ...
We observed the optical afterglow of the bright gamma-ray burst GRB030329 on the nights of 2003 March 29, using the Kiso observatory (the University of Tokyo) 1.05 m Schmidt telescope. Data were...
Shirasaki, Y., Kawai, N., Yoshida, A., Matsuoka, M., Tamagawa, T., Torii, K., ...
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 international...
Highlights of the HETE-2 Mission (2003)
Lamb, D. Q., Ricker, G. R., Barraud, C., Boer, M., Braga, J., ...
The HETE-2 mission has been highly productive. It has observed more than 250 GRBs so far. It is currently localizing 25 - 30 GRBs per year, and has localized 43 GRBs to date. Twenty-one of these...
HETE-2 Observations of the Extremely Soft X-Ray Flash XRF 020903 (2003)
Sakamoto, T., Lamb, D. Q., Graziani, C., Donaghy, T. Q., Suzuki, M., Ricker, G., ...
We report HETE-2 WXM/FREGATE observations of the X-ray flash, XRF 020903. This event was extremely soft: the ratio log(S_X/S_gamma) = 0.7, where S_X and S_gamma are the fluences in the 2-30 and...
Scientific Highlights of the HETE-2 Mission (2003)
Lamb, D. Q., Ricker, G. R., Atteia, J-L., Barraud, C., Boer, M., Braga, J., ...
The HETE-2 mission has been highly productive. It has observed more than 250 GRBs so far. It is currently localizing 25 - 30 GRBs per year, and has localized 43 GRBs to date. Twenty-one of these...
Multi-band optical follow-up observations of GRB 020813 at KISO and Bisei observatories (2003)
Urata, Y., Nishiura, S., Miyata, T., Mito, H., Kawabata, T., Nakada, Y., ...
Observations were made of the optical afterglow of GRB020813 (Fox, Blake & Price, 2002) with the KISO observatory 1.05 m Schmidt telescope and the Bisei astronomical observatory 1.01 m telescope....
On The Spectrum and Spectropolarimetry of Type Ic Hypernova SN 2003dh/GRB 030329 (2003)
Kawabata, K. S., Deng, J., Wang, L., Mazzali, P., Nomoto, K., Maeda, K., ...
Spectroscopic and spectropolarimetric observations of SN 2003dh/GRB 030329 obtained in 2003 May using the Subaru 8.2 m telescope are presented. The properties of the SN are investigated through a...
HETE-2 Localization and Observation of the Bright, X-Ray-Rich Gamma-Ray Burst GRB021211 (2003)
Crew, G. B., Lamb, D. Q., Ricker, G. R., Kawai, N., Vanderspek, R., ...
A bright, x-ray-rich GRB was detected by HETE-2 at 11:18:34.03 UT on 11 Dec 2002. The WXM localization was to 14' and relayed to the GCN 22 s after the start of the burst. The ground SXC localization...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2003)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2003)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
Graziani, C., Shirasaki, Y., Donaghy, T., Fenimore, E., Galassi, M., Kawai, N., ...
WXM gives GRB localizations in instrument coordinates. WXM localizations must be converted to celestial coordinates using spacecraft aspect information obtained by the optical cameras on HETE. We...
Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE (2002)
Barraud, C., Olive, J-F., Lestrade, J. P., Atteia, J-L., Hurley, K., Ricker, G., ...
We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with...
HETE-2 Localization and Observations of the Short, Hard Gamma-Ray Burst GRB020531 (2002)
Lamb, D. Q., Ricker, G. R., Hurley, K., Kawai, N., Shirasaki, Y., ...
The {\it HETE-2} (hereafter \HETE) French Gamma Telescope (FREGATE) and the Wide-field X-ray Monitor (WXM) instruments detected a short ($t_{50} = 360$ msec in the FREGATE 85-300 keV energy band),...
GRB010921: Localization and Observations by the HETE Satellite (2002)
Ricker, G., Hurley, K., Lamb, D., Woosley, S., Atteia, J-L, Kawai, N., ...
On September 21 at 18950.56 SOD (05:15:50.56) UT the FREGATE gamma-ray instrument on the High Energy Transient Explorer (HETE) detected a bright gamma-ray burst (GRB). The burst was also seen by the...
Current transport in metal/hafnium oxide/silicon structure (2002)
Zhu, WJ, Ma, TP, Tamagawa, T, Kim, Johann; U0039178, Di, Y
Based on the experimental results of the temperature dependence of gate leakage current and Fowler-Nordheim tunneling characteristics at 77 K, we have extracted the energy band diagrams and current...
$\Xi^-$ emission probabilities at $(K^-,K^+)$ reaction points and the $\Xi N$ interaction (2001)
Yamamoto, Y., Tamagawa, T., Fukuda, T., Motoba, T.
$\Xi^-$ escaping and scattering probabilities in the $(K^-,K^+)$ reaction with nuclear targets is investigated on the basis of the eikonal approximation. Calculations are performed using the $S=-2$...
Baude, P. F., Ye, C., Tamagawa, T., Polla, D. L.
Crack-free ferroelectric Pb(0.865)La(0.09)Zr(0.65)Ti(0.35) PLZT (9/65/35) transparent thin films have been deposited using the sol-gel deposition technique on silicon substrates. An intermediate...
SOL-GEL Derived Ferroelectric Thin Films in Silicon Micromachining, (1991)
Hsueh, C. C., Tamagawa, T., Ye, C., Helgeson, A.
Ferroelectric thin films have been integrated with silicon micromechanical structures in the fabrication of microsensor and microactuator structures. Both the piezoelectric and pyroelectric effects...
Increase in insulin release from rat pancreatic islets by quinolone antibiotics.
Maeda, N., Tamagawa, T., Niki, I., Miura, H., Ozawa, K., Watanabe, G., ...
1. The present study was undertaken to elucidate the mechanism(s) of hypoglycaemia caused by quinolone antibiotics. We investigated the effects of various quinolone antibiotics on insulin release in...