Search Publications
Heavy Element Analysis of X-Ray Faint Elliptical Galaxies
Fukazawa, Yasushi; Tozuka, Miyako
Past ASCA and ROSAT observations could not support the general view that elliptical galaxies are sources of metals in the intracluster medium, since observational results have shown that X-ray faint elliptical galaxies exhibit too low metal abundances of hot interstellar medium (ISM). We investigated the radial profiles of the temperature and abun…
Vertical Temperature Structures of the Solar Corona Derived with the Hinode X-Ray Telescope
Golub, Leon; Hara, Hirohisa; Shimojo, Masumi +12 more
We obtained temperature structures in faint coronal features above and near the solar limb with the X-Ray Telescope aboard the Hinode satellite by accurately correcting the scattered X-rays from surrounding bright regions with occulted images during the solar eclipses. Our analysis yields a polar coronal hole temperature of about 1.0MK and an emis…
VERA Observations of SiO Masers in the Symbiotic Star R Aquarii
Hirota, Tomoya; Kurayama, Tomoharu; Honma, Mareki +28 more
We present phase-referenced maps of the SiO maser transitions v = 1 J = 1--0 and v = 2 J = 1--0 from the symbiotic stellar system R Aquarii, which hosts an evolved AGB star plus a hot companion. Observations were performed at two epochs: 2004.98 and 2005.98. Accurate absolute coordinates and proper motions of the emission centroid were obtained; t…
INTEGRAL and RXTE/ASM Observations on IGR J17098-3628
Zhang, Shu; Qu, Jin-Lu; Wang, Jian-Min +5 more
To further probe the possible nature of the unidentified source IGR J17098-3628, we have carried out a detailed analysis of its long-term time variability, as monitored by Rossi X-ray Timing Explorer/All Sky Monitor (RXTE/ASM), and of its hard X-ray properties, as observed by the International Gamma-Ray Astrophysics Laboratory (INTEGRAL). INTEGRAL…
X-Ray Imaging Spectrometer (XIS) on Board Suzaku
Hamaguchi, Kenji; Dotani, Tadayasu; Miller, Eric D. +43 more
The XIS is an X-ray Imaging Spectrometer system, consisting of state-of-the-art charge-coupled devices (CCDs) optimized for X-ray detection, camera bodies, and control electronics. Four sets of XIS sensors are placed at the focal planes of the grazing-incidence, nested thin-foil mirrors (XRT: X-Ray Telescope) onboard the Suzaku satellite. Three of…
The X-Ray Observatory Suzaku
Hamaguchi, Kenji; White, Nicholas E.; Isobe, Naoki +140 more
High-sensitivity wide-band X-ray spectroscopy is the key feature of the Suzaku X-ray observatory, launched on 2005 July 10. This paper summarizes the spacecraft, in-orbit performance, operations, and data processing that are related to observations. The scientific instruments, the high-throughput X-ray telescopes, X-ray CCD cameras, non-imaging ha…
The Infrared Astronomical Mission AKARI*
Goto, Tomotsugu; Nakagawa, Takao; Shirahata, Mai +90 more
AKARI, the first Japanese satellite dedicated to infrared astronomy, was launched on 2006 February 21, and started observations in May of the same year. AKARI has a 68.5 cm cooled telescope, together with two focal-plane instruments, which survey the sky in six wavelength bands from the mid- to far-infrared. The instruments also have the capabilit…
Hard X-Ray Detector (HXD) on Board Suzaku
Isobe, Naoki; Yamaoka, Kazutaka; Fukazawa, Yasushi +66 more
The Hard X-ray Detector (HXD) on board Suzaku covers a wide energy range from 10keV to 600keV by the combination of silicon PIN diodes and GSO scintillators. The HXD is designed to achieve an extremely low in-orbit background based on a combination of new techniques, including the concept of a well-type active shield counter. With an effective are…
The Infrared Camera (IRC) for AKARI -- Design and Imaging Performance
Pearson, C. P.; Ohyama, Y.; Takagi, T. +25 more
The Infrared Camera (IRC) is one of two focal-plane instruments on the AKARI satellite. It is designed for wide-field deep imaging and low-resolution spectroscopy in the near- to mid-infrared (1.8-26.5'
The X-Ray Telescope onboard Suzaku
Maeda, Yoshitomo; Ishida, Manabu; Kunieda, Hideyo +31 more