Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Search for Cosmic Neutrino and Gamma-Ray Emitting Transients in 7.3
  Years of ANTARES and Fermi LAT Data   We analyze 7.3 years of ANTARES high-energy neutrino and Fermi LAT
{\gamma}-ray data in search of cosmic neutrino + {\gamma}-ray ({\nu}+{\gamma})
transient sources or source populations. Our analysis has the potential to
detect either individual {\nu}+{\gamma} transient sources (durations {\delta}t
< 1000~s), if they exhibit sufficient {\gamma}-ray or neutrino multiplicity, or
a statistical excess of {\nu}+{\gamma} transients of lower multiplicities.
Treating ANTARES track and cascade event types separately, we establish
detection thresholds by Monte Carlo scrambling of the neutrino data, and
determine our analysis sensitivity by signal injection against scrambled
datasets. We find our analysis is sensitive to {\nu}+{\gamma} transient
populations responsible for $>$5\% of the observed gamma-coincident neutrinos
in the track data at 90\% confidence. Applying our analysis to the unscrambled
data reveals no individual {\nu}+{\gamma} events of high significance; two
ANTARES track + Fermi {\gamma}-ray events are identified that exceed a once per
decade false alarm rate threshold ($p=17\%$). No evidence for subthreshold
{\nu}+{\gamma} source populations is found among the track ($p=39\%$) or
cascade ($p=60\%$) events. While TXS 0506+056, a blazar and variable
(non-transient) Fermi {\gamma}-ray source, has recently been identified as the
first source of high-energy neutrinos, the challenges in reconciling
observations of the Fermi {\gamma}-ray sky, the IceCube high-energy cosmic
neutrinos, and ultra-high energy cosmic rays using only blazars suggest a
significant contribution by other source populations. Searches for transient
sources of high-energy neutrinos remain interesting, with the potential for
neutrino clustering or multimessenger coincidence searches to lead to discovery
of the first {\nu}+{\gamma} transients.

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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci