Search Publications
Suzaku and XMM-Newton Observations of Diffuse X-Ray Emission from the Eastern Tip Region of the Carina Nebula
Hamaguchi, Kenji; Corcoran, Michael F.; Petre, Robert +3 more
The eastern tip region of the Carina Nebula was observed with the Suzaku XIS for 77ks to conduct a high-precision spectral study of extended X-ray emission. XMM-Newton EPIC data of this region were also utilized to detect point sources. The XIS detected strong extended X-ray emission from the entire field-of-view with a 0.2--5keV flux of 0.7--4 × …
X-Ray Observations of the Sagittarius D HII Region toward the Galactic Center with Suzaku
Tsujimoto, Masahiro; Koyama, Katsuji; Tsuru, Takeshi Go +3 more
We present a Suzaku X-ray study of the Sagittarius D (Sgr D) HII region in the Galactic center region. Two 18' × 18' images by the X-ray Imaging Spectrometer (XIS) encompass the entire Sgr D complex. Thanks to the low background, XIS discovered two diffuse sources with low surface brightness and obtained their high signal-to-noise ratio spectra. O…
Origin of Thermal and Non-Thermal Hard X-Ray Emission from the Galactic Center
Maeda, Yoshitomo; Kokubun, Motohide; Nakazawa, Kazuhiro +10 more
We analyse new results of Chandra and Suzaku Observatories which found a flux of hard X-ray emission from the compact region around Sgr A* (r ∼ 100 pc). We suppose that this emission is generated by accretion processes onto the central supermassive blackhole when an unbound part of captured stars obtains an additional momentum. As a res…
A New Supernova Remnant Candidate and an Associated Outflow in the Sagittarius C Region
Koyama, K.; Nobukawa, M.; Tsuru, T. G. +3 more
Spectral Analyses of the Nearest Persistent Ultraluminous X-Ray Source M 33 X-8
Weng, Shan-Shan; Wang, Jun-Xian; Gu, Wei-Min +1 more
We provide a detailed analysis of 12 XMM observations of the nearest persistent extragalactic ultraluminous X-ray source (ULX), M 33 X-8. No significant spectral evolution has been detected for the period of the observations, and therefore we combine the individual observations to increase the signal-to-noise ratio for a spectral fitting. The comb…
Suzaku-WAM, Konus-Wind, and Swift-BAT Observations of Prompt Emission of the High-Redshift GRB 050904
Yamaoka, Kazutaka; Nakagawa, Yujin E.; Ohno, Masanori +12 more
We present the results of the high-redshift GRB 050904 at z = 6.295 from joint spectral analysis among Swift-BAT, Konus-Wind, and Suzaku-WAM, covering a wide energy range of 15--5000keV. The νFu spectrum peak energy, Epeak, was measured at 314+173-89 keV, corresponding to 2291+1263-634
X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku
Drake, Jeremy J.; Tsujimoto, Masahiro; Ness, Jan-Uwe +2 more
We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88d after the explosion using the Suzaku satellite. With a ∼20ks exposure, the X-ray Imaging Spectrometer detected X-ray emission significantly harder than typical super-soft source emission. The X-ray spectrum shows Kα lines from N, Ne, Mg, Si, and S, and…
Search for Sc-K Line Emission from RX J0852.0-4622 Supernova Remnant with Suzaku
Petre, Robert; Terada, Yukikatsu; Bamba, Aya +6 more
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 on the detection of an emission line around 4.1keV from this region of the sky. This line would arise from K-band fluorescence by 44Sc, the immediate decay product o…
Abundance Inhomogeneity in the Northern Rim of the Cygnus Loop
Katsuda, Satoru; Uchida, Hiroyuki; Tsunemi, Hiroshi +3 more
We observed the northern rim of the Cygnus Loop with the Suzaku observatory in 5 pointings (P21-P25). From a spatially resolved analysis, all of the spectra were well fitted by a single component of the non-equilibrium ionization plasma model. From the best-fit parameters, we found that the abundances of the heavy elements are significantly lower …
Suzaku Observations across the Cygnus Loop from the Northeastern to the Southwestern Rim
Katsuda, Satoru; Uchida, Hiroyuki; Tsunemi, Hiroshi +1 more
We have observed the Cygnus Loop from the northeast (NE) rim to the southwest (SW) rim using Suzaku in 10 pointings just north of previous XMM-Newton observations. The observation data obtained were divided into 45 rectangular regions where the width was configured so that each region would hold 8000-12000photons. The spectrum acquired from each r…