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Evolution of buoyant bubbles in M87
The morphology of the X-ray- and radio-emitting features in the central ~50 kpc region around the galaxy M87 strongly suggests that buoyant bubbles of cosmic rays (inflated by an earlier nuclear
XMM-Newton observations of the Perseus Cluster. I. The temperature and surface brightness structure
We present preliminary results of a XMM-Newton 50 ks observation of the Perseus Cluster that provides an unprecedented view of the central 0.5 Mpc region. The projected gas temperature declines
X-ray luminosity function of faint point sources in the Milky Way
We assessed the contribution to the X-ray (above 2 keV) luminosity of the Milky Way by different classes of low-mass binary systems and single stars. We began by using the RXTE Slew Survey of the sky
Hard X-ray view of the past activity of Sgr A in a natural Compton mirror
We report the association of the recently discovered hard X-ray source IGR J17475−2822 with the giant molecular cloud Sgr B2 in the Galactic Center region. The broad band (3-200 keV) spectrum of the
Universal X-ray emissivity of the stellar population in early-type galaxies: unresolved X-ray sources in NGC 3379
We use deep Chandra observations to measure the emissivity of the unresolved X-ray emission in the elliptical galaxy NGC 3379. After elimination of bright, low-mass X-ray binaries with luminosities
Cooling flows as a calorimeter of active galactic nucleus mechanical power
ABSTRA C T The assumption that radiative cooling of gas in the centres of galaxy clusters is approximately balanced by energy input from a central supermassive black hole implies that the observed
Lighthouses of the universe : the most luminous celestial objects and their use for cosmology : proceedings of the MPA/ESO/MPE/USM Joint Astronomy Conference held in Garching, Germany, 6-10 August
From the Contents: Clusters of Galaxies.- Brightest Galaxies.- Gamma-ray Bursts as the Lighthouses.- Gravitational Lensing and Gravitational Waves.- QSO, AGN, Blazars - Observational Data.- First
INTEGRAL/IBIS all-sky survey in hard X-rays
We present results of an all-sky hard X-ray survey based on almost four years of observations with the IBIS telescope onboard the INTEGRAL observatory. The dead time-corrected exposure of the survey
Hard X-ray luminosity function and absorption distribution of nearby AGN : INTEGRAL all-sky survey
Aims. We study the hard X-ray luminosity function and absorption distribution of local ($z\lesssim 0.1$) active galactic nuclei (AGN) and discuss the implications for AGN cosmological evolution and
The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of two key questions in