Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for gamma-ray emission from AE Aquarii with seven years of
  FERMI-LAT observations   AE Aquarii (AE Aqr) is a cataclysmic binary hosting one of the fastest
rotating (P$_{\rm spin}$ = 33.08 s) white dwarfs known. Based on seven years of
Fermi Large Area Telescope (LAT) Pass 8 data, we report on a deep search for
gamma-ray emission from AE Aqr. Using X-ray observations from ASCA, XMM-Newton,
Chandra, Swift, Suzaku, and NuSTAR, spanning 20 years, we substantially extend
and improve the spin ephemeris of AE Aqr. Using this ephemeris, we searched for
gamma-ray pulsations at the spin period of the white dwarf. No gamma-ray
pulsations were detected above 3 $\sigma$ significance. Neither phase-averaged
gamma-ray emission nor gamma-ray variability of AE Aquarii is detected by
Fermi-LAT. We impose the most restrictive upper limit to the gamma-ray flux
from AE Aqr to date: $1.3\times 10^{-12}$ erg cm$^{-2}$ s$^{-1}$ in the 100
MeV-300 GeV energy range, providing constraints on models.

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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: math
15
The categories of this paper are: nucl-ex