X-ray emission from the blazar AO 0235+16: the XMM-Newton and Chandra point of view

X-ray emission from the blazar AO 0235+16: the XMM-Newton and Chandra point of view

We analyse five observations of the BL Lac object AO 0235+16 performed with the Chandra and XMM-Newton satellites during the years 2000–2005. In the February 2002 observation the source is found in a bright state and presents a steep X-ray spectrum, while in all the other epochs it is faint and the spectrum is hard. The soft X-ray spectrum appears to be strongly absorbed, likely by the interven...

XMM-Newton and Chandra view of the Cluster Abell 85 and its X-Ray Filament

Abstract. From ROSAT data, the bright X-ray cluster Abell 85 was found to show a roughly symmetrical shape, on to which are superimposed several features, among which: (1) a blob or group of galaxies falling on to the main cluster, with the gas in the impact region probably hotter and the galaxies in that zone showing enhanced star formation; (2) a filament, either diffuse or made of small grou...

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چکیده ندارد.

X-Ray Observations of Neutron Stars with XMM-Newton & Chandra

The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era

We present a detailed and self-consistent modeling of the cosmic X-ray background (XRB) based on the most up-todate X-ray luminosity functions (XLF) and evolution of Active Galactic Nuclei (AGN). The large body of observational results collected by soft (0.5-2 keV) and hard (2-10 keV) X-ray surveys are used to constrain at best the properties of the Compton-thin AGN population and its contribut...