Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Multiwavelength Study of the Extreme AGN J2310-437   We present new X-ray, radio, and optical data for the unusual galaxy/cluster
system J2310-437. Our results confirm the presence of an active nucleus, and
suggest an interpretation as an anomalous BL Lac object of bulk relativistic
Doppler factor < 2, with an optically deficient radio-to-X-ray spectrum. The
radio, optical, and soft X-ray flux densities could lie along a single
power-law function, lacking the curvature typical of BL Lac objects. Compared
with other known sources that may have comparable multifrequency spectra,
J2310-437 is the most extreme. Its low isotropic optical/UV radiation is
consistent with the intensity of external photons governing the electron
spectral break through Compton cooling; in this source the external photon
density would be too low to produce a spectral break below the X-ray.

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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an