Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-thermal Cosmic Backgrounds from Blazars: the contribution to the
  CMB, X-ray and gamma-ray Backgrounds   We present a new assessment of the contribution of Blazars to the
extragalactic background radiation across the e.m. spectrum. Our calculations
rely on deep Blazar radio counts that we derived combining several
multifrequency surveys. The integrated Blazar emission yields a broad-band
non-thermal background that in some parts of the e.m. spectrum dominates the
extragalactic brightness. Blazars are the main point-like contributors to the
CMB. Their integrated emission causes an apparent T increase of 5-50 muK in the
50-250 GHz range. The CMB fluctuation spectrum is sensibly contaminated at
l>300, for a Poissonian source distribution, or at lower l values if spatial
clustering is present. We estimate that well over 100,000 Blazars will produce
a significant signal in the PLANCK CMB anisotropy maps. Because of the
microwave-Xray flux correlation, these sources are expected to have flux > a
few 10^{-15} erg/s in the soft X-ray band. Thus, a large fraction of the
foreground sources in CMB anisotropy maps could be identified and removed using
a multi frequency approach, provided that a sufficiently deep all sky X-ray
survey will be available. We further show that Blazars are a major constituent
of all high-E extragalactic backgrounds. Their contribution is 11-12% at X-ray
frequencies and possibly 100% in the 0.5-50 MeV band. At E>100 MeV, the Blazar
collective emission, obtained extrapolating their integrated micro-wave flux to
the gamma-ray band using the SED of EGRET detected sources, over-predicts the
extragalactic background by a large factor, implying that Blazars not only
dominate the gamma-ray sky but also that their average duty cycle at these
frequencies must be rather low. We also find that Blazars of the HBL type may
produce a significant amount of flux at TeV energies.

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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc