Arai, Akira, Uemura, Makoto, Sasada, Mahito, Trushkin, Sergei A., Ueda, Yoshihiro, Takahashi, Hiromitsu, ...
We report detailed, long term near-infrared (NIR) light curves of GRS 1915+105 in 2007-2008, covering its long "soft state" for the first time. From our NIR monitoring and the X-ray data of the All...
Modeling and Reproducibility of Suzaku HXD PIN/GSO Background (2009)
Fukazawa, Yasushi, Mizuno, Tsunefumi, Watanabe, Shin, Kokubun, Motohide, Takahashi, Hiromitsu, Kawano, Naomi, ...
Suzaku Hard X-ray Detector (HXD) achieved the lowest background level than any other previously or currently operational missions sensitive in the energy range of 10--600 keV, by utilizing PIN...
Iron emission lines on the galactic ridge observed with Suzaku (2009)
Yamauchi, Shigeo, Ebisawa, Ken, Tanaka, Yasuo, Koyama, Katsuji, Matsumoto, Hironori, Yamasaki, Noriko Y., ...
Spectral transitions of an ultraluminous X-ray source, NGC 2403 Source 3 (2008)
Isobe, Naoki, Makishima, Kazuo, Takahashi, Hiromitsu, Mizuno, Tsunefumi, Miyawaki, Ryouhei, Gandhi, Poshak, ...
Suzaku observation of an ultraluminous X-ray source, NGC 2403 Source 3, performed on 2006 March 16--17, is reported. The Suzaku XIS spectrum of Source 3 was described with a multi-color...
Iron Emission Lines on the Galactic Ridge Observed with Suzaku (2008)
Yamauchi, Shigeo, Ebisawa, Ken, Tanaka, Yasuo, Koyama, Katsuji, Matsumoto, Hironori, Yamasaki, Noriko Y., ...
In order to elucidate origin of the Galactic Ridge X-ray Emission, we analyzed Suzaku data taken at various regions along the Galactic plane and studied their Fe-K emission line features. Suzaku...
The 2006 November outburst of EG Aquarii: the SU UMa nature revealed (2008)
Imada, Akira, Stubbings, Rod, Kato, Taichi, Uemura, Makoto, Krajci, Thomas, Torii, Ken'ichi, ...
We report time-resolved CCD photometry of the cataclysmic variable EG Aquarii during the 2006 November outburst During the outburst, superhumps were unambiguously detected with a mean period of...
Suzaku Results on Cygnus X-1 in the Low/Hard State (2008)
Makishima, Kazuo, Takahashi, Hiromitsu, Yamada, Shin'ya, Done, Chris, Kubota, Aya, Dotani, Tadayasu, ...
The black-hole binary Cygnus X-1 was observed for 17 ks with the Suzaku X-ray observatory in 2005 October, while it was in a low/hard state with a 0.7-300 keV luminosity of 4.6 x 10^37 erg/s. The XIS...
Spectral study of the galactic ridge X-ray emission with Suzaku (2008)
Ebisawa, Ken, Yamauchi, Shigeo, Tanaka, Yasuo, Koyama, Katsuji, Ezoe, Yuichiro, Bamba, Aya, ...
Suzaku Observation of the Anomalous X-ray Pulsar CXOU J164710.2--455216 (2007)
Naik, Sachindra, Dotani, Tadayasu, Kawai, Nobuyuki, Kokubun, Motohide, Anada, Takayasu, Morii, Mikio, ...
Suzaku TOO observation of the anomalous X-ray pulsar CXOU J164710.2-455216 was performed on 2006 September 23--24 for a net exposure of 38.8 ks. During the observation, the XIS was operated in 1/8...
Spectral Study of the Galactic Ridge X-ray Emission with Suzaku (2007)
Ebisawa, Ken, Yamauchi, Shigeo, Tanaka, Yasuo, Koyama, Katsuji, Ezoe, Yuichiro, Bamba, Aya, ...
We have observed a typical Galactic plane field at (l,b) = (28.46d, -0.20d) with Suzaku for 100 ksec to carry out a precise spectral study of the Galactic Ridge X-ray Emission (GRXE). The field is...
In Orbit Timing Calibration of the Hard X-Ray Detector on Board Suzaku (2007)
Terada, Yukikatsu, Enoto, Teruaki, Miyawaki, Ryouhei, Ishisaki, Yoshitaka, Dotani, Tadayasu, Ebisawa, Ken, ...
The hard X-ray detector (HXD) on board the X-ray satellite Suzaku is designed to have a good timing capability with a 61 $\mu$s time resolution. In addition to detailed descriptions of the HXD timing...
Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center (2007)
Yuasa, Takayuki, Tamura, Ken-ichi, Nakazawa, Kazuhiro, Kokubun, Motohide, Makishima, Kazuo, Bamba, Aya, ...
Five on-plane regions within +/- 0.8deg of the Galactic center were observed with the Hard X-ray Detector (HXD) and the X-ray Imaging Spectrometer (XIS) onboard Suzaku. From all regions, significant...
PoGOLite - A High Sensitivity Balloon-Borne Soft Gamma-ray Polarimeter (2007)
Kamae, Tuneyoshi, Andersson, Viktor, Arimoto, Makoto, Axelsson, Magnus, Bettolo, Cecilia Marini, Björnsson, Claes-Ingvar, ...
We describe a new balloon-borne instrument (PoGOLite) capable of detecting 10% polarisation from 200mCrab point-like sources between 25 and 80keV in one 6 hour flight. Polarisation measurements in...
Suzaku Observations of Hercules X-1 : Measurements of the Two Cyclotron Harmonics (2007)
Enoto, Teruaki, Makishima, Kazuo, Terada, Yukikatsu, Mihara, Tatehiro, Nakazawa, Kazuhiro, Ueda, Tsuyoshi, ...
The accretion-powered pulsar Her X-1 was observed with Suzaku twice in its main-on state, on 2005 October 5-6 and 2006 March 29-30, for a net exposure of 30.5 ks and 34.4 ks, respectively. In the...
Takahashi, Tadayuki, Tanaka, Takaaki, Uchiyama, Yasunobu, Hiraga, Junko S., Nakazawa, Kazuhiro, Watanabe, Shin, ...
We report on results from Suzaku broadband X-ray observations of the southwest part of the Galactic supernova remnant (SNR) RX J1713.7-3946 with an energy coverage of 0.4-40 keV. The X-ray spectrum,...
Suzaku wide-band observations of SN 1006 (2007)
Bamba, Aya, Fukazawa, Yasushi, Hiraga, Junko S., Hughes, John P., Katagiri, Hideaki, Kokubun, Motohide, ...
We report on the wide band spectra of SN 1006 as observed by Suzaku. Thermal and nonthermal emission are successfully resolved thanks to the excellent spectral response of Suzaku's X-ray CCD XIS. The...
Low/Hard State Spectra of GRO J1655-40 Observed with Suzaku (2007)
Takahashi, Hiromitsu, Fukazawa, Yasushi, Mizuno, Tsunefumi, Hirasawa, Ayumi, Kitamoto, Shunji, Sudoh, Keisuke, ...
The Galactic black-hole binary GRO J1655$-$40 was observed with Suzaku on 2005 September 22--23, for a net exposure of 35 ks with the X-ray Imaging Spectrometer (XIS) and 20 ks with the Hard X-ray...
Discovery of a new X-ray transient source in the Scutum region with Suzaku (2007)
Yamauchi, Shigeo, Ebisawa, Ken, Bamba, Aya, Ishida, Manabu, Iwasawa, Kazushi, Tanaka, Yasuo, ...
The X-ray observatory Suzaku (2007)
Mitsuda, Kazuhisa, Bautz, Mark, Inoue, Hajime, Kelley, Richard L., Koyama, Katsuji, Kunieda, Hideyo, ...
Hard X-ray investigation of the galactic center region with Suzaku (2007)
Kokubun, Motohide, Yuasa, Takayuki, Tamura, Ken-ichi, Makishima, Kazuo, Takahashi, Tadayuki, Nakazawa, Kazuhiro, ...
Kubota, Aya, Dotani, Tadayasu, Cottam, Jean, Kotani, Taro, Done, Chris, Ueda, Yoshihiro, ...
We present the results of six Suzaku observations of the recurrent black hole transient 4U1630-472 during its decline from outburst from February 8 to March 23 in 2006. All observations show the...
Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission (2006)
Koyama, Katsuji, Hyodo, Yoshiaki, Inui, Tatsuya, Nakajima, Hiroshi, Matsumoto, Hironori, Tsuru, Takeshi Go, ...
We have observed the diffuse X-ray emission from the Galactic center (GC) using the X-ray Imaging Spectrometer (XIS) on Suzaku. The high-energy resolution and the low-background orbit provide...
XMM-Newton and Chandra Observations of the Central Region of M31 (2004)
Takahashi, Hiromitsu, Okada, Yuu, Kokubun, Motohide, Makishima, Kazuo
The archival XMM-Newton data of the central region of M31 were analyzed for diffuse X-ray emission. Point sources with the 0.5--10 keV luminosity exceeding $\sim 4 \times 10^{35}$ erg s$^{-1}$ were...
ASCA Observations of the Central Regions of M31 (2001)
Takahashi, Hiromitsu, Okada, Yuu, Kokubun, Motohide, Makishima, Kazuo
Using ASCA, spatially integrated X-ray spectra of the central regions of M31 were studied. Data were accumulated over three different circular regions, with the radii of 3', 6' and 12', all centered...