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ASCA View of Our Galactic Center: Remains of Past Activities in X-Rays?
Detailed X-ray images and spectra of the galactic-center region up to 10 keV were obtained with ASCA. Diffuse thermal-emission with distinct Ka lines from highly ionized ions of various elements has…
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Faint X-Ray Sources Resolved in the ASCA Galactic Plane Survey and Their Contribution to the Galactic Ridge X-Ray Emission
The X-ray emission from the central region of the Galactic plane, |l| ≲ 45° and |b| ≲ 0.°4, was studied in the 0.7-10 keV energy band with a spatial resolution of ∼3′ with the Advanced Satellite for…
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The X-Ray Observatory Suzaku
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…
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Discovery of Non-Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN 1006?
We report on the ASCA results of a featureless X-ray spectrum from RX J1713.7—3946, a new shell-like SNR discovered with the ROSAT all-sky survey. The northwest part of RX J1713.7-3946 was in the…
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Intense 6.7-keV iron line emission from the Galactic Centre
THE Galactic Centre, although obscured by dust at optical wavelengths, is luminous in higher-energy radiation. Gamma-ray observations suggest that a large number of supernovae or novae, or a single…
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Complex Spectra of the Galactic Ridge X-Rays Observed with ASCA
X-ray spectra of the Galactic ridge emission in the Scutum arm region have been obtained with ASCA GIS and SIS in the energy range 0.7-10 keV. The observed spectra are basically of thermal emission…
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Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission
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…
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Optically thin hot plasma near the Galactic center : mapping observations of the 6.7 keV iron line
Les resultats des observations de la raie d'emission 6.7 keV par le satellite Ginga en direction du centre galactique sont presentes. Cette raie d'emission est attribuable au fer de type helium dans…
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Diffuse Hard X-Ray Sources Discovered with the ASCA Galactic Plane Survey
We found diffuse hard X-ray sources G11.0+0.0, G25.5+0.0, and G26.6-0.1 in the ASCA Galactic plane survey data. The X-ray spectra are featureless with no emission line and are fitted with both models…
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Origin of the Hard X-ray Emission from the Galactic Plane
TLDR
The deepest hard X-ray survey of a Galactic plane region that is devoid of known x-ray point sources detected at least 36 new hard x-rays point sources in addition to strong diffuse emission within a 17′ by 17′ field of view, indicating omnipresence within the Galactic plane of a hot plasma.
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