Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of 3.6 - 8.0 Micron Spitzer/IRAC Galactic Center Survey Point
  Sources with Chandra X-Ray Point Sources in the Central 40x40 Parsecs   We have studied the correlation between 2357 Chandra X-ray point sources in a
40 x 40 parsec field and ~20,000 infrared sources we observed in the
corresponding subset of our 2 x 1.4 degree Spitzer/IRAC Galactic Center Survey
at 3.6-8.0 um, using various spatial and X-ray hardness thresholds. The
correlation was determined for source separations of less than 0.5", 1" or 2".
Only the soft X-ray sources show any correlation with infrared point sources on
these scales, and that correlation is very weak. The upper limit on hard X-ray
sources that have infrared counterparts is <1.7% (3 sigma). However, because of
the confusion limit of the IR catalog, we only detect IR sources with absolute
magnitudes < ~1. As a result, a stronger correlation with fainter sources
cannot be ruled out. Only one compact infrared source, IRS 13, coincides with
any of the dozen prominent X-ray emission features in the 3 x 3 parsec region
centered on Sgr A*, and the diffuse X-ray and infrared emission around Sgr A*
seems to be anti-correlated on a few-arcsecond scale. We compare our results
with previous identifications of near-infrared companions to Chandra X-ray
sources.

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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: nlin
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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: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: hep-th