Suzaku Observation of the Metallicity Distribution in the Elliptical Galaxy NGC 4636 (2009)
Hayashi, Katsuhiro, Fukazawa, Yasushi, Tozuka, Miyako, Nishino, Sho, Matsushita, Kyoko, Takei, Yoh, ...
NGC 4636, an X-ray bright elliptical galaxy, was observed for 70 ks with Suzaku. The low background and good energy resolution of the XIS enable us to estimate the foreground Galactic emission...
Suzaku Observations of the cluster of galaxies Abell 2052 (2008)
Tamura, Takayuki, Mitsuda, Kazuhisa, Takei, Yoh, Yamasaki, Noriko Y., ITOH, Akiharu, Hayashida, Kiyoshi, ...
The results from Suzaku XIS observations of the relaxed cluster of galaxies Abell2052 are presented. Offset pointing data are used to estimate the Galactic foreground emission in the direction to the...
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...
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, ...
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, ...
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...
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...
Frequency Domain Multiplexing of TES Signals by Magnetic Field Summation (2006)
YAMASAKI, Noriko Y., TAKEI, Yoh, MASUI, Kensuke, MITSUDA, Kazuhisa, MOROOKA, Toshimitsu, NAKAYAMA, Satoshi
In frequency-domain multiplexing (FDM) for TES signals, a magnetic field summation method utilizing a multi-input SQUID has the fundamental merit of small degradation of the signal-to-noise ratio. We...
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...
A New Method to Map Flares in Quasars (2003)
Yonehara, Atsunori, Mineshige, Shin, Takei, Yoh, Chartas, George, Turner, Edwin L.
Recently, Chartas et al. (2001) detected a rapid X-ray flare in the gravitationally lensed, multiple image quasar RX J0911.4+0551. Dramatic events, such as rapid X-ray flares, are useful in providing...
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...