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OVII and OVIII line emission in the diffuse soft X-ray background: heliospheric and galactic contributions
Ballet, J.; Lallement, R.; Acero, F. +2 more
Aims:We study the 0.57 keV (O VII triplet) and 0.65 keV (O VIII) diffuse emission generated by charge transfer collisions between solar wind (SW) oxygen ions and interstellar H and He neutral atoms in the inner Heliosphere. These lines which dominate the 0.3-1.0 keV energy interval are also produced by hot gas in the galactic halo (GH) and possibl…
The variable X-ray spectrum of Markarian 766. II. Time-resolved spectroscopy
Turner, T. J.; Kraemer, S. B.; Reeves, J. N. +1 more
Context: The variable X-ray spectra of AGN systematically show steep power-law high states and hard-spectrum low states. The hard, low state has previously been found to be a component with only weak variability. The origin of this component and the relative importance of effects such as absorption and relativistic blurring are currently not clear…
SGR 1806-20 about two years after the giant flare: Suzaku, XMM-Newton and INTEGRAL observations
Tiengo, A.; Götz, D.; Mereghetti, S. +9 more
In December 2004, the soft gamma-ray repeater SGR 1806-20 emitted the most powerful giant flare ever observed. This probably involved a large-scale rearrangement of the magnetosphere leading to observable variations in the properties of its X-ray emission. Here we present the results of the first Suzaku observation of SGR 1806-20, together with al…
Possible non-thermal nature of the soft-excess emission in the cluster of galaxies Sérsic 159-03
Kaastra, J. S.; Vink, J.; Tamura, T. +3 more
We present an analysis of new Suzaku data and archival data from XMM-Newton of the cluster of galaxies Sérsic 159-03, which has a strong soft X-ray excess emission component. The Suzaku observation confirms the presence of the soft excess emission, but it does not confirm the presence of redshifted O VII lines in the cluster. Radial profiles and 2…