Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-messenger observations of a flaring blazar coincident with
  high-energy neutrino IceCube-170922A   Individual astrophysical sources previously detected in neutrinos are limited
to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of
high-energy cosmic neutrinos remain unidentified. On 22 September 2017 we
detected a high-energy neutrino, IceCube-170922A, with an energy of
approximately 290 TeV. Its arrival direction was consistent with the location
of a known gamma-ray blazar TXS 0506+056, observed to be in a flaring state. An
extensive multi-wavelength campaign followed, ranging from radio frequencies to
gamma-rays. These observations characterize the variability and energetics of
the blazar and include the first detection of TXS 0506+056 in very-high-energy
gamma-rays. This observation of a neutrino in spatial coincidence with a
gamma-ray emitting blazar during an active phase suggests that blazars may be a
source of high-energy neutrinos.

9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th