Restoring the Suzaku Source Position Accuracy and Point-Spread Function (2008)
Uchiyama, Yasunobu, Maeda, Yoshitomo, Ebara, Masatoshi, Fujimoto, Ryuichi, Ishisaki, Yoshitaka, Ishida, Manabu, ...
We present an empirical correction of sky coordinates of X-ray photons obtained with the XIS aboard the Suzaku satellite to improve the source position accuracy and restore the point-spread function...
On the lack of strong O-line excess in the Coma cluster outskirts from Suzaku (2008)
Takei, Yoh, Miller, Eric D., Bregman, Joel N., Kimura, Shunsuke, Ohashi, Takaya, Mitsuda, Kazuhisa, ...
About half of the baryons in the local Universe are thought to reside in the so-called warm-hot intergalactic medium (WHIM) at temperatures of 0.1-10 million K. Thermal soft excess emission in the...
FUJIMOTO, Ryuichi, TAKEMURA, Gaku, ISHII, Masato, TOYODA, Takehiko, TSURUMI, Hiroshi
Since a receiver (RX) and a transmitter (TX) are operated simultaneously in a WCDMA transceiver, noise and intermodulation distortion performances of a low-noise amplifier (LNA) are degraded by a...
The X-ray spectrum of the intermediate polar AO Piscium (2007)
Coel Hellier, Koji Mukai, Manabu Ishida, Ryuichi Fujimoto
An ASCA observation of AO Psc shows an X-ray lightcurve dominated by a sinusoidal spin-pulse. There are absorption dips recurring with the orbital cycle, but otherwise no other periodic variations in...
Suzaku Observations of the North Polar Spur: Evidence for Nitrogen Enhancement (2007)
Miller, Eric D., Tsunemi, Hiroshi, Bautz, Mark W., McCammon, Dan, Fujimoto, Ryuichi, Hughes, John P., ...
We present observations of the North Polar Spur (NPS) using the X-ray Imaging Spectrometer (XIS) aboard the Suzaku X-ray satellite. The NPS is a large region of enhanced soft X-ray and radio emission...
Evidence for solar-wind charge-exchange X-ray emission from the Earth's magnetosheath (2007)
Fujimoto, Ryuichi, Mitsuda, Kazuhisa, McCammon, Dan, Takei, Yoh, Bauer, Michael, Ishisaki, Yoshitaka, ...
The X-ray observatory Suzaku (2007)
Mitsuda, Kazuhisa, Bautz, Mark, Inoue, Hajime, Kelley, Richard L., Koyama, Katsuji, Kunieda, Hideyo, ...
Evidence for solar-wind charge-exchange X-ray emission from the Earth's magnetosheath (2007)
Fujimoto, Ryuichi, Mitsuda, Kazuhisa, McCammon, Dan, Takei, Yoh, Bauer, Michael, Ishisaki, Yoshitaka, ...
Suzaku/Chandra emission/absorption line observations of hot gas in and around our galaxy (2007)
Mitsuda, Kazuhisa, Fujimoto, Ryuichi, Yamasaki, Noriko Y., Yoshino, Tomotaka, Hagihara, Toshishige, Masui, Kensuke, ...
On-orbit performance of the X-ray telescopes and thermal wobbling of the Suzaku satellite (2007)
Maeda, Yoshitomo, Ebara, Masatoshi, Fujimoto, Ryuichi, Hayashi, Takayuki, Inoue, Hirohiko, Ishisaki, Yoshitaka, ...
Warm-Hot Intergalactic Medium Associated with the Coma Cluster (2006)
Takei, Yoh, Henry, J. Patrick, Finoguenov, Alexis, Mitsuda, Kazuhisa, Tamura, Takayuki, Fujimoto, Ryuichi, ...
We present our XMM-Newton RGS observations of X Comae, an AGN behind the Coma cluster. We detect absorption by NeIX and OVIII at the redshift of Coma with an equivalent width of 3.3+/-1.8 eV and...
Suzaku Observations of the Local and Distant Hot ISM (2006)
Smith, Randall K., Bautz, Mark W., Edgar, Richard J., Hamaguchi, Kenji, Hughes, John P., Ishida, Manabu, ...
Suzaku observed the molecular cloud MBM12 and a blank field less than 3 degrees away to separate the local and distant components of the diffuse soft X-ray background. Towards MBM12, a local (D< 275...
Tsuru, Takeshi Go, Ozawa, Midori, Hyodo, Yoshiaki, Matsumoto, Hironori, Koyama, Katsuji, Awaki, Hisamitsu, ...
The extended X-ray emission from 'the Cap' region located 11' (11.6 kpc) above the disk of the starburst galaxy M82 has been observed with Suzaku and XMM-Newton. Owing to the good energy resolution...
Evidence for Solar-Wind Charge-Exchange X-Ray Emission from the Earth's Magnetosheath (2006)
Fujimoto, Ryuichi, Mitsuda, Kazuhisa, McCammon, Dan, Takei, Yoh, Bauer, Michael, Ishisaki, Yoshitaka, ...
We report an apparent detection of the C VI 4p to 1s transition line at 459 eV, during a long-term enhancement (LTE) in the Suzaku north ecliptic pole (NEP) observation of 2005 September 2. The...
Search for Oxygen Emission from Warm-Hot Intergalactic Medium around A2218 with Suzaku (2006)
Takei, Yoh, Ohashi, Takaya, Henry, J. Patrick, Mitsuda, Kazuhisa, Fujimoto, Ryuichi, Tamura, Takayuki, ...
We searched for redshifted O emission lines from the possible warm-hot intergalactic medium (WHIM) surrounding the cluster of galaxies A2218 at z=0.1756 using the XIS instrument on Suzaku. This...
Searching for cosmic missing baryons with DIOS -- Diffuse Intergalactic Oxygen Surveyor -- (2004)
Suto, Yasushi, Yoshikawa, Kohji, Yamasaki, Noriko Y., Mitsuda, Kazuhisa, Fujimoto, Ryuichi, Furusho, Tae, ...
Approximately 30 to 50 percent of the total baryons in the present universe is supposed to take a form of warm/hot intergalactic medium (WHIM) whose X-ray continuum emission is very weak. In order to...
Futamoto, Kazuo, Mitsuda, Kazuhisa, Takei, Yoh, Fujimoto, Ryuichi, Yamasaki, Noriko
We searched for absorption lines of highly ionized O and Ne in the energy spectra of two Low-mass X-ray binaries, 4U1820-303 in the globular cluster NGC6624 and Cyg X-2, observed with the Chandra...
O and Ne K absorption edge structures and interstellar abundance towards Cyg X-2 (2002)
Takei, Yoh, Fujimoto, Ryuichi, Mitsuda, Kazuhisa, Onaka, Takashi
We have studied the O and Ne absorption features in the X-ray spectrum of Cyg X-2 observed with the Chandra LETG. The O absorption edge is represented by the sum of three absorption-edge components...