Search Publications
Monte Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
Hamaguchi, Kenji; Miller, Eric D.; Maeda, Yoshitomo +31 more
We have developed a framework for the Monte Carlo simulations of X-Ray Telescope (XRT) and X-ray Imaging Spectrometer (XIS) on board Suzaku, mainly for the scientific analysis of spatially and spectroscopically complex celestial sources. A photon-by-photon instrumental simulator is built on the ANL platform, which has been successfully used in ASC…
A Tale of Two Spicules: The Impact of Spicules on the Magnetic Chromosphere
Carlsson, Mats; Tsuneta, Saku; Shimizu, Toshifumi +11 more
We use high-resolution observations of the Sun in CaIIH (3968Å) from the Solar Optical Telescope on Hinode to show that there are at least two types of spicules that dominate the structure of the magnetic solar chromosphere. Both types are tied to the relentless magnetoconvective driving in the photosphere, but have very different dynamic properti…
The Far-Infrared Surveyor (FIS) for AKARI
Lee, H. M.; White, G. J.; Wang, L. +57 more
The Far-Infrared Surveyor (FIS) is one of two focal-plane instruments on the AKARI satellite. FIS has four photometric bands at 65, 90, 140, and 160 µm, and uses two kinds of array detectors. The FIS arrays and optics are designed to sweep the sky with high spatial resolution and redundancy. The actual scan width is more than eight arcminutes, and…
In-Orbit Performance of the Hard X-Ray Detector on Board Suzaku
Isobe, Naoki; Enoto, Teruaki; Yamaoka, Kazutaka +55 more
The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board the X-ray astronomy satellite Suzaku are described. Its basic performances, including a wide energy bandpass of 10-600keV, energy resolutions of ∼4keV (FWHM) at 40keV and ∼11% at 511keV, and a high background rejection efficiency, have been confirmed by extensive in…
EUV Emission Lines and Diagnostics Observed with Hinode/EIS
Del Zanna, Giulio; Landi, Enrico; Harra, Louise K. +9 more
Quiet Sun and active region spectra from the Hinode/EIS instrument are presented, and the strongest lines from different temperature regions discussed. A list of emission lines recommended to be included in EIS observation studies is presented based on analysis of blending and diagnostic potential using the CHIANTI atomic database. In addition we …
A Study of Polar Jet Parameters Based on Hinode XRT Observations
Golub, Leon; Shimojo, Masumi; Narukage, Noriyuki +9 more
Hinode/SOHO campaign 7197 is the most extensive study of polar jet formation and evolution from within both the north and south polar coronal holes so far. For the first time, this study showed that the appearance of X-ray jets in the solar coronal holes occurs at very high frequency - about 60 jets d-1 on average. Using observations co…
Suzaku Observations of the Hard X-Ray Variability of MCG -6-30-15: the Effects of Strong Gravity around a Kerr Black Hole
Fabian, Andrew C.; Kunieda, Hideyo; Haba, Yoshito +21 more
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 14-45keV band, which is dominated by a strong reflection hump, is quenched relative to that at a few keV. This directly demonstrates that the whole reflection spectrum is much less variable than the power-l…
Evidence for Solar-Wind Charge-Exchange X-Ray Emission from the Earth's Magnetosheath
Yamaguchi, Hiroya; Mitsuda, Kazuhisa; Fujimoto, Ryuichi +7 more
We report an apparent detection of the C VI 4p to 1s transition line at 459eV, during a long-term enhancement (LTE) in the Suzaku north ecliptic pole observation of 2005 September 2. The observed line intensity is comparable to that of the C VI 2p to 1s line at 367eV. This is strong evidence for the charge-exchange process. In addition, O VII , O …
Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission
Maeda, Yoshitomo; Takahashi, Tadayuki; Koyama, Katsuji +14 more
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 provided excellent spectra of the GC diffuse X-rays (GCDX). The XIS found many emission lines in the GCDX near the energy of K-shell transitions of iron and nickel. …
Near-Infrared and Mid-Infrared Spectroscopy with the Infrared Camera (IRC) for AKARI
Pearson, C. P.; Ohyama, Y.; Takagi, T. +22 more
The Infrared Camera (IRC) is one of the two instruments on board the AKARI satellite. In addition to deep imaging from 1.8 to 26.5 ×