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SLAC Publication: SLAC-PUB-14264
SLAC Release Date: October 27, 2010
Galaxy Clusters in the Swift/BAT era II: 10 more Clusters detected above 15 keV
Ajello, Marco .
We report on the discovery of 10 additional galaxy clusters detected in the
ongoing Swift/BAT all-sky survey. Among the newly BAT-discovered clusters
there are: Bullet, Abell 85, Norma, and PKS 0745-19. Norma is the only cluster,
among those presented here, which is resolved by BAT. For all the clusters we
perform a detailed spectral analysis using XMM-Newton and Swift/BAT data
to investigate the presence of a hard (non-thermal) X-ray excess. We find that
in most cases the clusters emission in t... Show Full Abstract
We report on the discovery of 10 additional galaxy clusters detected in the
ongoing Swift/BAT all-sky survey. Among the newly BAT-discovered clusters
there are: Bullet, Abell 85, Norma, and PKS 0745-19. Norma is the only cluster,
among those presented here, which is resolved by BAT. For all the clusters we
perform a detailed spectral analysis using XMM-Newton and Swift/BAT data
to investigate the presence of a hard (non-thermal) X-ray excess. We find that
in most cases the clusters emission in the 0.3200 keV band can be explained
by a multi-temperature thermal model confirming our previous results. For two
clusters (Bullet and Abell 3667) we find evidence for the presence of a hard X-ray
excess. In the case of the Bullet cluster, our analysis confirms the presence of a
non-thermal, power-law like, component with a 20100 keV flux of 3.410−12 erg cm−2 s−1 as detected in previous studies. For Abell 3667 the excess emission can be successfully modeled as a hot component (kT Show Partial Abstract
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