Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Using Chandra Localizations and Gaia Distances and Proper Motions to
  Classify Hard X-ray Sources Discovered by INTEGRAL   Here we report on X-ray observations of ten 17-60 keV sources discovered by
the INTEGRAL satellite. The primary new information is sub-arcsecond positions
obtained by the Chandra X-ray Observatory. In six cases (IGR J17040-4305, IGR
J18017-3542, IGR J18112-2641, IGR J18434-0508, IGR J19504+3318, and IGR
J20084+3221), a unique Chandra counterpart is identified with a high degree of
certainty, and for five of these sources (all but J19504), Gaia distances or
proper motions indicate that they are Galactic sources. For four of these, the
most likely classifications are that the sources are magnetic Cataclysmic
Variables (CVs). J20084 could be either a magnetic CV or a High Mass X-ray
Binary. We classify the sixth source (J19504) as a likely Active Galactic
Nucleus (AGN). In addition, we find likely Chandra counterparts to IGR
J18010-3045 and IGR J19577+3339, and the latter is a bright radio source and
probable AGN. The other two sources, IGR J12529-6351 and IGR J18013-3222 do not
have likely Chandra counterparts, indicating that they are transient, highly
variable, or highly absorbed.

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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph