Is the black hole in GX 339-4 really spinning rapidly? (2009)
Yamada, S., Makishima, K., Uehara, Y., Nakazawa, K., Takahashi, H., Dotani, T., ...
The wide-band Suzaku spectra of the black hole binary GX 339-4, acquired in 2007 February during the Very High state, were reanalyzed. Effects of event pileup (significant within ~ 3' of the image...
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,...
The Interplanetary Network Supplement to the HETE-2 Gamma-Ray Burst Catalog (2009)
Hurley, K., Barraud, C., Pelangeon, A., Boer, M., Vanderspek, R., ...
Between 2000 November and 2006 May, one or more spacecraft of the interplanetary network (IPN) detected 226 cosmic gamma-ray bursts that were also detected by the FREGATE experiment aboard the...
X-ray Diagnostics of Thermal Conditions of the Hot Plasmas in the Centaurus Cluster (2009)
Takahashi, I., Kawaharada, M., Makishima, K., Matsushita, K., Fukazawa, Y., Ikebe, Y., ...
X-ray data of the Centaurus cluster, obtained with {\it XMM-Newton} for 45 ksec, were analyzed. Deprojected EPIC spectra from concentric thin shell regions were reproduced equally well by a...
Observation of an energetic radiation burst from mountain-top thunderclouds (2009)
Tsuchiya, H., Enoto, T., Torii, T., Nakazawa, K., Yuasa, T., Torii, S., ...
During thunderstorms on 2008 September 20, a simultaneous detection of gamma rays and electrons was made at a mountain observatory in Japan located 2770 m above sea level. Both emissions, lasting 90...
The Evolution of Galaxy Clusters Across Cosmic Time (2009)
Arnaud, M., Bohringer, H., Jones, C., McNamara, B., Ohashi, T., Patnaude, D., ...
The large scale structure of the present Universe is determined by the growth of dark matter density fluctuations and by the dynamical action of dark energy and dark matter. While much progress has...
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...
Suzaku Observation of the New Soft Gamma Repeater SGR 0501+4516 in Outburst (2009)
Enoto, T., Nakagawa, Y. E., Rea, N., Esposito, P., Gotz, D., Hurley, K., ...
We present the first Suzaku observation of the new Soft Gamma Repeater SGR 0501+4516, performed on 2008 August 26, four days after the onset of bursting activity of this new member of the magnetar...
The status and future of the third interplanetary network (2009)
Hurley, K., Cline, T., Mitrofanov, I. G., Golovin, D., Litvak, M. L., Sanin, A. B., ...
Takahashi, T., Kelley, R., Mitsuda, K., Kunieda, H., Petre, R., White, N., ...
The NeXT (New exploration X-ray Telescope), the new Japanese X-ray Astronomy Satellite following Suzaku, is an international X-ray mission which is currently planed for launch in 2013. NeXT is a...
Gandhi, P., Makishima, K., Durant, M., Fabian, A. C., Dhillon, V. S., Marsh, T. R., ...
We present the discovery of optical/X-ray flux correlations on rapid timescales in the low/hard state of the Galactic black hole GX 339-4. The source had recently emerged from outburst and was...
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,...
C. S. Reynolds, A. J. Loan, A. C. Fabian, K. Makishima, W. N. Br, T. Mizuno
We present ASCA observations of the nearby galaxies Dwingeloo 1 (Dw1) and Maffei 1 (Mf1). X-ray sources are clearly detected within 3 arcminutes of the optical nuclei of both galaxies. Despite the...
Detection of High-Energy Gamma Rays from Winter Thunderclouds (2007)
Tsuchiya, H., Enoto, T., Yamada, S., Yuasa, T., Kawaharada, M., Kitaguchi, T., ...
A report is made on a comprehensive observation of a burstlike -ray emission from thunderclouds on the Sea of Japan, during strong thunderstorms on 6 January 2007. The detected emission, lasting for...
Detection of high-energy gamma rays from winter thunderclouds (2007)
Tsuchiya, H., Enoto, T., Yamada, S., Yuasa, T., Kawaharada, M., Kitaguchi, T., ...
A report is made on a comprehensive observation of a burst-like $\gamma$-ray emission from thunderclouds on the Sea of Japan, during strong thunderstorms on 2007 January 6. The detected emission,...
Tsuchiya, H., Miyasaka, H., Takahashi, E., Shimoda, S., Yamada, Y., Kondo, I., ...
The purpose of this work is to search the Yangbajing neutron monitor data obtained between 1998 October and 2000 June for solar neutrons associated with solar flares. Using the onset times of 166...
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...
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...
Suzaku Reveals Helium-burning Products in the X-ray Emitting Planetary Nebula BD+303639 (2006)
Murashima, M., Kokubun, M., Makishima, K., Kotoku, J., Murakami, H., Matsushita, K., ...
BD+303639, the brightest planetary nebula at X-ray energies, was observed with Suzaku, an X-ray observatory launched on 2005 July 10. Using the X-ray Imaging Spectrometer, the K-lines from C VI, O...
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...
Design and Performance of the Soft Gamma-ray Detector for the NeXT mission (2006)
Tajima, H., Kamae, T., Madejski, G., Mitani, T., Nakazawa, K., Tanaka, T., ...
The Soft Gamma-ray Detector (SGD) on board the NeXT (Japanese future high energy astrophysics mission) is a Compton telescope with narrow field of view (FOV), which utilizes Compton kinematics to...
GRB 060425: IPN localization and KW spectrum of a short, hard burst (2006)
Cummings, J., Barthelmy, S., Gehrels, N., Krimm, H., Golenetskii, S., Aptekar, R., ...
Bright short hard GRB 060303: IPN localization and Konus spectrum (2006)
Golenetskii, S., Aptekar, R., Mazets, E., Pal'shin, V., Frederiks, D., Cline, T., ...
GRB 060213: IPN localization (2006)
Pal'shin, V., Golenetskii, S., Aptekar, R., Mazets, E., Frederiks, D., Hurley, K., ...
INTEGRAL SPI limits on electron-positron annihilation radiation from the galactic plane (2005)
Teegarden, B. J., Watanabe, K., Jean, P., Knödlseder, J., Lonjou, V., Roques, J. P., ...
A search for cyclotron resonance features with INTEGRAL (2004)
Okada, Y., Niko, H., Kokubun, M., Makishima, K., Nakajima, M., Mihara, T., ...
Fabrication of the Astro-E Hard X-ray detector (2003)
Nakazawa, K, Kamae, T, Makishima, K, Takahashi, T, Murakami, T, Tashiro, M, ...
XEUS - the X-ray evolving universe spectroscopy mission (2003)
Parmar, A. N., Hasinger, G., Arnaud, M., Barcons, X., Barret, D., Blanchard, A., ...
The dark group candidate RXJ 0419+0225 (2003)
Kawaharada, M., Takahashi, I., Nakazawa, K., Matsushita, K., Fukazawa, Y., Shimasaku, K., ...
Tamura, T., Kaastra, J. S., Makishima, K., Takahashi, I.
The results from an X-ray spectroscopic study of the giant elliptical galaxy NGC5044 in the center of a galaxy group are presented. The line dominated soft X-ray spectra (mainly Fe-L and O VIII Ly_a)...
Xu, H., Kahn, S. M., Peterson, J. R., Behar, E., Paerels, F. B. S., Mushotzky, R. F., ...
We present the first high spectral resolution X-ray observation of the giant elliptical galaxy NGC 4636, obtained with the Reflection Grating Spectrometer on-board the XMM-Newton Observatory. The...
Ueda, Y., Takahashi, T., Inoue, H., Tsuru, T., Sakano, M., Ishisaki, Y., ...
We carried out the first wide-area unbiased survey with the ASCA satellite in the 0.7-10 keV band around a north Galactic-pole region covering a continuous area of 7 square degrees (Large Sky Survey;...
Development of a cryogen-free superconducting dipole magnet (1998)
Sato, Y, Makishima, K, Mizumaki, S, Yamamoto, A, Moriyama, S, Inoue, Y, ...
Astro-E hard X-ray detector (1997)
Kamae, T, Ezawa, H, Fukazawa, Y, Hirayama, M, Idesawa, E, Iyomoto, N, ...
Development of a 56 mm aperture superconducting dipole model magnet for LHC (1997)
Shintomi, T, Yamamoto, A, Doi, Y, Haruyama, T, Higashi, N, Kawamata, H, ...
Test results of a single aperture 10 tesla dipole model magnet for the Large Hadron Collider (1995)
Yamamoto, A, Shintomi, T, Kimura, N, Doi, Y, Haruyama, T, Higashi, N, ...
Development of twin aperture dipole magnets for the Large Hadron Collider (1995)
Yamamoto, A, Shintomi, T, Higashi, N, Hirabayashi, H, Kawamata, H, Song, N, ...