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The NeXT Mission
T. Takahashi, R. Kelley, K. Mitsuda +28
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 2…
Restoring the Suzaku Source Position Accuracy and Point-Spread Function
Yasunobu Uchiyama, Yoshitomo Maeda, Masatoshi Ebara +9
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 poi…
On the lack of strong O-line excess in the Coma cluster outskirts from Suzaku
Yoh Takei, Eric D. Miller, Joel N. Bregman +6
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…
Suzaku Observations of the North Polar Spur: Evidence for Nitrogen Enhancement
Eric D. Miller, Hiroshi Tsunemi, Mark W. Bautz +10
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…
Warm-Hot Intergalactic Medium Associated with the Coma Cluster
Yoh Takei, J. Patrick Henry, Alexis Finoguenov +4
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.…
Monte-Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
Y. Ishisaki, Y. Maeda, R. Fujimoto +31
We have developed a framework for the Monte-Carlo simulation of the X-Ray Telescopes (XRT) and the X-ray Imaging Spectrometers (XIS) onboard Suzaku, mainly for the scientific analy…
Suzaku Observations of the Local and Distant Hot ISM
Randall K. Smith, Mark W. Bautz, Richard J. Edgar +18
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 MBM1…
X-ray Spectral Study of the extended emission,'the Cap', located 11.6 kpc above the disk of M82
Takeshi Go Tsuru, Midori Ozawa, Yoshiaki Hyodo +11
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…
Evidence for Solar-Wind Charge-Exchange X-Ray Emission from the Earth's Magnetosheath
Ryuichi Fujimoto, Kazuhisa Mitsuda, Dan McCammon +7
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 Sep…
Search for Oxygen Emission from Warm-Hot Intergalactic Medium around A2218 with Suzaku
Yoh Takei, Takaya Ohashi, J. Patrick Henry +12
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…
DIOS: the Diffuse Intergalactic Oxygen Surveyor
T. Ohashi, M. Ishida, S. Sasaki +14
We present our proposal for a small X-ray mission DIOS (Diffuse Intergalactic Oxygen Surveyor), consisting of a 4-stage X-ray telescope and an array of TES microcalorimeters, coole…
Locating the Warm-Hot Intergalactic Medium in the Simulated Local Universe
K. Yoshikawa, K. Dolag, Y. Suto +11
We present an analysis of mock spectral observation of warm-hot intergalactic medium (WHIM) using a constrained simulation of the local universe. The simulated map of oxygen emissi…
Probing Warm-Hot Intergalactic Medium Associated with the Virgo Cluster using an Oxygen Absorption Line
R. Fujimoto, Y. Takei, T. Tamura +8
To detect a warm-hot intergalactic medium associated with the large-scale structure of the universe, we observed a quasar behind the Virgo cluster with XMM-Newton. With a net expos…
Future Japanese missions for the study of warm-hot intergalactic medium
T. Ohashi, M. Ishida, S. Sasaki +10
We present our proposal for a small X-ray mission DIOS (Diffuse Intergalactic Oxygen Surveyor) to perform survey observations of warm-hot intergalactic medium using OVII and OVIII…
Searching for cosmic missing baryons with DIOS -- Diffuse Intergalactic Oxygen Surveyor --
Yasushi Suto, Kohji Yoshikawa, Noriko Y. Yamasaki +9
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 ver…
Prospects for X-ray Studies of Galaxy Clusters with Astro-E2/XRS
T. Furusho, K. Mitsuda, N. Yamasaki +2
The Astro-E2 high resolution X-Ray Spectrometer (XRS) is expected to provide a major enhancement in study of clusters of galaxies. Astro-E2 is the fifth Japanese X-ray astronomy ob…
XMM-Newton observation of the ULIRG NGC 6240: The physical nature of the complex Fe K line emission
Th. Boller, R. Keil, G. Hasinger +5
We report on an XMM-Newton observation of the ultraluminous infrared galaxy NGC 6240. The 0.3-10 keV spectrum can be successfully modelled with: (i) three collisionally ionized pla…
ASCA Slew Survey
Ken Ebisawa, R. Fujimoto, Y. Ueda
We are systematically analyzing ASCA GIS data taken during the satellite attitude maneuver operation. Our motivation is to search for serendipitous hard X-ray sources and make the…
O and Ne K absorption edge structures and interstellar abundance towards Cyg X-2
Yoh Takei, Ryuichi Fujimoto, Kazuhisa Mitsuda +1
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 absorptio…
Detection of an Iron Emission Feature from the Lensed BAL QSO H1413+117 at z=2.56
T. Oshima, K. Mitsuda, R. Fujimoto +8
We present the X-ray energy spectrum of the lensed BAL QSO H1413+117 (the Cloverleaf) at z=2.56 observed with the Chandra X-ray observatory. We detected 293 photons in a 40 ks Adva…
X-Ray Beaming due to Resonance Scattering in the Accretion Column of Magnetic Cataclysmic Variables
Yukikatsu. Terada, M. Ishida, K. Makishima +4
Extremely strong ionized Fe emission lines, with the equivalent width reaching about 4000 eV, were discovered with ASCA from a few Galactic compact objects, including AX J2315-0592…
XMM-Newton study of the ULIRG NGC 6240
Ralf Keil, Th. Boller, R. Fujimoto
A recently performed XMM-Newton observation of the ULIRG NGC 6240 clearly indicates the presence of an AGN contribution to its X-ray spectrum. In the 5.0 - 7.0 keV energy range the…
Multiwavelength Monitoring of the BL Lacertae Object PKS 2155-304 in May 1994. III. Probing the Inner Jet through Multiwavelength Correlations
C. Megan Urry, A. Treves, L. Maraschi +16
In May 1994 the BL Lac object PKS 2155-304 was observed continuously for ~10 d with IUE and EUVE and for 2 d with ASCA, as well as with ROSAT and with ground- based radio, IR, and…