Search Publications
Low-Resolution Spectrum of the Zodiacal Light with the AKARI InfraRed Camera
Sakon, Itsuki; Matsuura, Shuji; Wada, Takehiko +3 more
We present near- and mid-infrared zodiacal light spectra obtained with the AKARI Infra-Red Camera (IRC). A catalog of 278 spectra of the diffuse sky covering a wide range of Galactic and ecliptic latitudes was constructed. The wavelength range of this catalog is
Distribution of Si, Fe, and Ni in the Intracluster Medium of the Coma Cluster
Sato, Kosuke; Matsushita, Kyoko; Sato, Takuya +1 more
We studied the distributions of Si, Fe, and Ni in the intracluster medium (ICM) of the Coma cluster, one of the largest clusters in the nearby universe, using XMM-Newton data up to 0.5 r180 and Suzaku data of the central region up to 0.16 r180. Using the flux ratios of the Lyα line of H-like Si and the 7.8 keV line blend to t…
A New Cluster of Galaxies Towards the Galactic Bulge, Suzaku J1759-3450
Maeda, Yoshitomo; Haba, Yoshito; Mori, Hideyuki +2 more
We observed an extended X-ray source, designated as Suzaku J1759-3450, with Suzaku and Chandra observations towards 1RXS J175911.0-344921, which is an unidentified X-ray source listed in the ROSAT Bright Source Catalogue. A conspicuous emission line at 6 keV was also found in the Suzaku J1759-3450 spectrum. Assuming the emission line to be K emiss…
Suzaku Detection of Thermal X-Ray Emission Associated with the Western Radio Lobe of Fornax A
Tashiro, Makoto S.; Inoue, Susumu; Seta, Hiromi
We present the results of X-ray mapping observations of the western radio lobe of the Fornax A galaxy, using the X-ray Imaging Spectrometer (XIS) onboard the Suzaku satellite with a total exposure time of 327 ks. The purpose of this study is to investigate the nature and spatial extent of the diffuse thermal emission around the lobe by exploiting …
Long-Term Variability of the O VII Line Intensity toward the Lockman Hole Observed with Suzaku from 2006 to 2011
Mitsuda, Kazuhisa; Yamasaki, Noriko Y.; Sakai, Kazuhiro +3 more
Long-term time variabilities of the O VII (0.57 keV) emission in the soft X-ray diffuse background were studied using six Suzaku annual observations of the blank sky towards the Lockman Hole made from 2006 to 2011. After time intervals in which the emission was enhanced on time scales of a few tens of ks were removed, the O VII intensity was found…
An X-Ray Counterpart of HESS J1427-608 Discovered with Suzaku
Dotani, Tadayasu; Terada, Yukikatsu; Matsumoto, Hironori +9 more
We report on the discovery of an X-ray counterpart of the unidentified very high-energy gamma-ray source HESS J1427-608. In the sky field coincident with HESS J1427-608, an extended source was found in the 2-8 keV band, and was designated as Suzaku J1427-6051. Its X-ray radial profile has an extension of σ = 0.'9 ± 0.'1 if approximated by a Gaussi…
Two Power-Law States of the Ultraluminous X-Ray Source IC 342 X-1
Isobe, Naoki; Kubota, Aya; Mineshige, Shin +3 more
In order to elucidate the emission properties of ultraluminous X-ray sources (ULXs) during their power-law (PL) state, we examined long-term X-ray spectral data of IC 342 X-1 during its PL state by using our own Suzaku data and archival data by XMM-Newton, Chandra, and Swift observations. The PL state of this source seems to be classified into two…
X-Ray Observation of the Galactic Supernova Remnant G355.6-0.0 with Suzaku
Koyama, Katsuji; Ota, Naomi; Yamauchi, Shigeo +1 more
We present results of the Galactic supernova remnant (SNR) G355.6-0.0 observed with Suzaku. We resolved diffuse emission detected with ASCA into two objects, G355.6-0.0 and a point-like source, Suzaku J173530-3236. The X-ray emission from G355.6-0.0 exhibits a center-filled morphology within the radio shell. The X-ray spectrum is well-represented …
Observations and Orbital Analysis of the High-Amplitude Delta Scuti Star SZLyncis: The Unusual Orbital Precession
Li, Lin-Jia; Qian, Sheng-Bang
We determined forty-two new times of light maximum from our photometry observations and WASP project, and collected all times of light maximum observed between 1961 and 2013 in order to calculate the orbital elements of the SZ Lyncis system and the secular change of the pulsation period with the classical O - C method. We confirmed the decrease of…
Search for Non-Thermal Emissions from an Isolated Magnetic White Dwarf, EUVE J0317-855, with Suzaku
Ishida, Manabu; Hayashi, Takayuki; Tashiro, Makoto S. +3 more