Shin Watanabe

Suzaku Observations of Extreme MeV Blazar SWIFT J0746.3+2548 (2008)

Watanabe, Shin, Sato, Rie, Takahashi, Tadayuki, Kataoka, Jun, Madejski, Greg, Sikora, Marek, ...

We report the Suzaku observations of the high luminosity blazar SWIFT J0746.3+2548 (J0746) conducted in November 2005. This object, with z = 2.979, is the highest redshift source observed in the...

High energy resolution hard X-ray and gamma-ray imagers using CdTe diode devices (2008)

Watanabe, Shin, Ishikawa, Shin-nosuke, Aono, Hiroyuki, Takeda, Shin'ichiro, Odaka, Hirokazu, Kokubun, Motohide, ...

We developed CdTe double-sided strip detectors (DSDs or cross strip detectors) and evaluated their spectral and imaging performance for hard X-rays and gamma-rays. Though the double-sided strip...

Study of Nonthermal Emission from SNR RX J1713.7-3946 with Suzaku (2008)

Tanaka, Takaaki, Uchiyama, Yasunobu, Aharonian, Felix A., Takahashi, Tadayuki, Bamba, Aya, Hiraga, Junko S., ...

We present results obtained from a series of observations of the supernova remnant RX J1713.7-3946 by the Suzaku satellite. The observations cover about two-thirds of the remnant surface. We...

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...

Measuring the Broad-band X-Ray Spectrum from 400 eV to 40 keV in the Southwest Part of the Supernova Remnant RX J1713.7-3946 (2007)

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...

Probing the Disk-jet Connection of the Radio Galaxy 3C120 Observed with Suzaku (2006)

Kataoka, Jun, Reeves, James N., Iwasawa, Kazushi, Markowitz, Alex G., Mushotzky, Richard F., Arimoto, Makoto, ...

Broad line radio galaxies (BLRGs) are a rare type of radio-loud AGN, in which the broad optical permitted emission lines have been detected in addition to the extended jet emission. Here we report on...

Revealing the High Energy Emission from the Obscured Seyfert Galaxy MCG -5-23-16 with Suzaku (2006)

Reeves, James N., Awaki, Hisamitsu, Dewangan, Gulab C., Fabian, Andy C., Fukazawa, Yasushi, Gallo, Luigi, ...

We report on a 100 ks Suzaku observation of the bright, nearby (z=0.008486) Seyfert 1.9 galaxy MCG -5-23-16. The broad-band (0.4-100 keV) X-ray spectrum allows us to determine the nature of the high...

Suzaku observations of the hard X-ray variability of MCG-6-30-15: the effects of strong gravity around a Kerr black hole (2006)

Miniutti, Giovanni, Fabian, Andrew C., Anabuki, Naohisa, Crummy, Jamie, Fukazawa, Yasushi, Gallo, Luigi, ...

Suzaku has, for the first time, enabled the hard X-ray variability of the Seyfert 1 galaxy MCG-6-30-15 to be measured. The variability in the 14-45 keV band, which is dominated by a strong reflection...

X-ray Spectral Study of the Photoionized Stellar Wind in Vela~X-1 (2006)

Watanabe, Shin, Sako, Masao, Ishida, Manabu, Ishisaki, Yoshitaka, Kahn, Steven M., Kohmura, Takayoshi, ...

We present results from quantitative modeling and spectral analysis of the high mass X-ray binary Vela X-1 obtained with the Chandra HETGS. The spectra exhibit emission lines from H-like and He-like...

Results of a Si/CdTe Compton Telescope (2005)

Oonuki, Kousuke, Tanaka, Takaaki, Watanabe, Shin, Takeda, Shin'ichiro, Nakazawa, Kazuhiro, Mitani, Takefumi, ...

We have been developing a semiconductor Compton telescope to explore the universe in the energy band from several tens of keV to a few MeV. We use a Si strip and CdTe pixel detector for the Compton...

Development of a Si/CdTe semiconductor Compton telescope (2004)

Tanaka, Takaaki, Mitani, Takefumi, Watanabe, Shin, Nakazawa, Kazuhiro, Oonuki, Kousuke, Sato, Goro, ...

We are developing a Compton telescope based on high resolution Si and CdTe imaging devices in order to obtain a high sensitivity astrophysical observation in sub-MeV gamma-ray region. In this paper,...

Detection of a Fully-resolved Compton Shoulder of the Iron K-alpha Line in the Chandra X-ray Spectrum of GX 301-2 (2003)

Watanabe, Shin, Sako, Masao, Ishida, Manabu, Ishisaki, Yoshitaka, Kahn, Steve M., Kohmura, Takayoshi, ...

We report the detection of a fully-resolved, Compton-scattered emission line in the X-ray spectrum of the massive binary GX 301-2 obtained with the High Energy Transmission Grating Spectrometer...

Chandra Observations and Optical Identification of Hard X-ray Sources Discovered with ASCA (2002)

Watanabe, Shin, Akiyama, Masayuki, Ueda, Yoshihiro, Ohta, Kouji, Mushotzky, Richard, Takahashi, Tadayuki, ...

We present the first results of the Chandra and optical follow-up observations of hard X-ray sources detected in the ASCA Medium Sensitivity Survey (AMSS). Optical identifications are made for five...

Recent Progress in CdTe and CdZnTe Detectors (2001)

Takahashi, Tadayui, Watanabe, Shin

Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) have been regarded as promising semiconductor materials for hard X-ray and Gamma-ray detection. The high atomic number of the materials...