Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radio VLBA polarization and multi-band monitoring of the high-redshift
  quasar S5 0836+710 during a high activity period   We report on results of a multi-band monitoring campaign from radio to gamma
rays of the high-redshift flat spectrum radio quasar S5 0836+710 during a high
activity period detected by the Large Area Telescope on board the Fermi
Gamma-ray Space Telescope. Two major flares were detected, in 2015 August and
November. In both episodes, the apparent isotropic gamma-ray luminosity exceeds
10^50 erg/s, with a doubling time scale of about 3 hours. The high gamma-ray
activity may be related to a superluminal knot that emerged from the core in
2015 April at the peak of the radio activity and is moving downstream along the
jet. The low variability observed in X-rays may indicate that X-ray emission is
produced by the low-energy tail of the same electron population that produces
the gamma-ray emission. The analysis of full-polarization pc-scale radio
observations suggests the presence of a limb-brightened polarization structure
at about 1 mas from the core in which a rotation measure gradient with a sign
change is observed transverse to the jet direction. These characteristics are
consistent with a scenario in which Faraday rotation is produced by a sheath of
thermal electrons with a toroidal magnetic field surrounding the emitting jet.

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The categories of this paper are: dg-ga
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The categories of this paper are: eess
4
The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc