Search Publications
Suzaku Detection of Diffuse Hard X-Ray Emission outside Vela X
Temim, Tea; Katsuda, Satoru; Petre, Robert +9 more
Vela X is a large, 3
Cryogenic Volume-Phase Holographic Grisms for MOIRCS
Shimasaku, Kazuhiro; Tanaka, Ichi; Yamada, Toru +12 more
We have developed high-dispersion VPH (volume phase holographic) grisms with zinc selenide (ZnSe) prisms for the cryogenic optical system of MOIRCS (Multi-Object near-InfraRed Camera and Spectrograph) for Y-, J-, H-, and K-band observations. We fabricated VPH gratings using a hologram resin. After several heat cycles at between room temperature an…
Observations of Plasma Blob Ejection from a Quiescent Prominence by Hinode Solar Optical Telescope
Isobe, Hiroaki; Watanabe, Hiroko; Hillier, Andrew
We report findings from 0''.2 resolution observations of the 2007 October 03 quiescent prominence observed with the Solar Optical Telescope on the Hinode satellite. The observations show clear ejections from the top of the quiescent prominence of plasma blobs. The ejections, originating from the top of prominence threads, are impulsively accelerat…
Detection of X-Ray Emission from the Unidentified TeV Gamma-Ray Source TeV J2032+4130
Kitamoto, Shunji; Murakami, Hiroshi; Nakamori, Takeshi +1 more
We observed the first unidentified TeV
AKARI/IRC Broadband Mid-Infrared Data as an Indicator of the Star-Formation Rate
Buat, Véronique; Burgarella, Denis; Murata, Katsuhiro L. +5 more
AKARI/Infrared Camera (IRC) Point Source Catalog provides a large amount of flux data at S9W (9µm) and L18W (18µm) bands. With the goal of constructing Star-Formation Rate (SFR) calculations using IRC data, we analyzed an IR selected GALEX-SDSS-2MASS-AKARI(IRC/Far-Infrared Surveyor) sample of 153 nearby galaxies. The far-infrared fluxe…
Improvements in Calibration of GSO Scintillators in the Suzaku Hard X-Ray Detector
Enoto, Teruaki; Fukazawa, Yasushi; Kokubun, Motohide +26 more
Improvements of the in-orbit calibration of GSO scintillators in the Hard X-ray Detector aboard Suzaku are reported. To resolve an apparent change in the energy scale of GSO, which appeared across the launch for unknown reasons, consistent and thorough re-analyses of both pre-launch and in-orbit data have been performed. With laboratory experiment…
Suzaku Measurement of Electron and Magnetic Energy Densities in the East Lobe of the Giant Radio Galaxy DA 240
Isobe, Naoki; Tashiro, Makoto S.; Seta, Hiromi
A careful analysis of the Suzaku data of the giant radio galaxy DA 240, of which the size is 1.48 Mpc, revealed diffuse X-ray emission associated with its east lobe. The diffuse X-ray spectrum was described with a simple power-law model with a photon index of
An X-Ray Spectroscopic Study of the Hot Interstellar Medium toward the Galactic Bulge
Mitsuda, Kazuhisa; Yamasaki, Noriko Y.; Wang, Q. Daniel +5 more
We present a detailed spectroscopic study of the hot gas toward the galactic bulge along the 4U 1820
The Suzaku Discovery of A Hard Power-Law Component in the Spectra of Short Bursts from SGR 0501+4516
Enoto, Teruaki; Makishima, Kazuo; Nakagawa, Yujin E.
Using data with the Suzaku XIS and HXD, spectral studies of short bursts from the soft gamma repeater SGR 0501
Properties of Dust and PAHs in the Hot Plasma of the Elliptical Galaxy NGC 4125 Revealed with AKARI and Spitzer Space Telescope
Oyabu, Shinki; Onaka, Takashi; Yamagishi, Mitsuyoshi +4 more
We present the spatial distributions of dust and polycyclic aromatic hydrocarbons (PAHs) in the elliptical galaxy NGC 4125, revealed by AKARI and Spitzer. NGC 4125 is relatively bright in dust and PAH emision for elliptical galaxies, although it certainly possesses diffuse interstellar hot plasma, indicated by the high spatial resolution X-ray dat…