Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Effect of Variability on X-Ray Binary Luminosity Functions: Multiple
  Epoch Observations of NGC 300 with Chandra   We have obtained three epochs of Chandra ACIS-I observations (totaling
$\sim$184 ks) of the nearby spiral galaxy NGC~300 to study the logN-logS
distributions of its X-ray point source population down to
$\sim$2$\times$10$^{-15}$ erg s$^{-1}$ cm$^{-2}$ in the 0.35-8 keV band
(equivalent to $\sim$10$^{36}$ erg s$^{-1}$). The individual epoch logN-logS
distributions are best described as the sum of a background AGN component, a
simple power law, and a broken power law, with the shape of the logN-logS
distributions sometimes varying between observations. The simple power law and
AGN components produce a good fit for "persistent" sources (i.e., with fluxes
that remain constant within a factor of $\sim$2). The differential power law
index of $\sim$1.2 and high fluxes suggest that the persistent sources
intrinsic to NGC~300 are dominated by Roche lobe overflowing low mass X-ray
binaries. The variable X-ray sources are described by a broken power law, with
a faint-end power law index of $\sim$1.7, a bright-end index of $\sim$2.8-4.9,
and a break flux of $\sim$8$\times10^{-15}$ erg s$^{-1}$ cm$^{-2}$
($\sim$4$\times10^{36}$ erg s$^{-1}$), suggesting they are mostly outbursting,
wind-fed high mass X-ray binaries, although the logN-logS distribution of
variable sources likely also contains low-mass X-ray binaries. We generate
model logN-logS distributions for synthetic X-ray binaries and constrain the
distribution of maximum X-ray fluxes attained during outburst. Our observations
suggest that the majority of outbursting X-ray binaries occur at sub-Eddington
luminosities, where mass transfer likely occurs through direct wind accretion
at $\sim$1-3% of the Eddington rate.

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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: math
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The categories of this paper are: physics
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an