Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Swift X-ray Telescope Monitoring of Fermi-LAT Gamma Ray Sources of
  Interest   We describe a long-term Swift monitoring program of Fermi gamma-ray sources,
particularly the 23 gamma-ray "sources of interest." We present a systematic
analysis of the Swift X-ray Telescope light curves and hardness ratios of these
sources, and we calculate excess variability. We present data for the time
interval of 2004 December 22 through 2012 August 31. We describe the analysis
methods used to produce these data products, and we discuss the availability of
these data in an online repository, which continues to grow from more data on
these sources and from a growing list of additional sources. This database
should be of use to the broad astronomical community for long term studies of
the variability of these objects and for inclusion in multi-wavelength studies.

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The categories of this paper are: chem-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th