Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investigating the Accretion Nature of Binary Supermassive Black Hole
  Candidate SDSS J025214.67-002813.7   We present results on a multi-wavelength analysis of SDSS
J025214.67-002813.7, a system which has been previously classified as a binary
AGN candidate based on periodic signals detected in the optical light curves.
We use available radio-X-ray observations of the system to investigate the true
accretion nature. Analyzing new observations from XMM-Newton and NuSTAR, we
characterize the X-ray emission and search for evidence of circumbinary
accretion. Although the 0.5-10 keV spectrum shows evidence of an additional
soft emission component, possibly due to extended emission from hot nuclear
gas, we find the spectral shape consistent with a single AGN. Compiling a full
multi-wavelength SED, we also search for signs of circumbinary accretion, such
as a "notch" in the continuum due to the presence of minidisks. We find that
the radio-optical emission agrees with the SED of a standard, radio-quiet, AGN,
however there is a large deficit in emission blueward of ~1400 A. Although this
deficit in emission can plausibly be attributed to a binary AGN system, we find
that the SED of SDSS J0252-0028 is better explained by emission from a
reddened, single AGN. However, future studies on the expected hard X-ray
emission associated with binary AGN (especially in the unequal-mass regime),
will allow for more rigorous analyses of the binary AGN hypothesis.

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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph