Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Broadband characterisation of the very intense TeV flares of the blazar
  1ES 1959+650 in 2016   1ES 1959+650 is a bright TeV high-frequency-peaked BL Lac object exhibiting
interesting features like "orphan" TeV flares and a broad emission in the
high-energy regime, that are difficult to interpret using conventional one-zone
Synchrotron Self-Compton (SSC) scenarios. We report the results from the Major
Atmospheric Gamma Imaging Cherenkov (MAGIC) observations in 2016 along with the
multi-wavelength data from the Fermi Large Area Telescope (LAT) and Swift
instruments. MAGIC observed 1ES 1959+650 with different emission levels in the
very-high-energy (VHE, E >100 GeV) gamma-ray band during 2016. In the long-term
data, the X-ray spectrum becomes harder with increasing flux and a hint of a
similar trend is also visible in the VHE band. An exceptionally high VHE flux
reaching ~ 3 times the Crab Nebula flux was measured by MAGIC on the 13th, 14th
of June and 1st July 2016 (the highest flux observed since 2002). During these
flares, the high-energy peak of the spectral energy distribution (SED) lies in
the VHE domain and extends up to several TeV. The spectrum in the gamma-ray
(both Fermi-LAT and VHE bands) and the X-ray bands are quite hard. On 13th June
and 1st July 2016, the source showed rapid variations of the VHE flux within
timescales of less than an hour. A simple one-zone SSC model can describe the
data during the flares requiring moderate to high values of the Doppler factors
(>=30-60). Alternatively, the high-energy peak of the SED can be explained by a
purely hadronic model attributed to proton-synchrotron radiation with jet power
L_{jet}~10^{46} erg/s and under high values of the magnetic field strength
(~100 G) and maximum proton energy (~few EeV). Mixed lepto-hadronic models
require super-Eddington values of the jet power. We conclude that it is
difficult to get detectable neutrino emission from the source during the
extreme VHE flaring period of 2016.

19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol