Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-TeV flaring from high energy blazars: An evidence of the
  photohadronic process   The high energy peaked blazars are known to undergo episodes of flaring in
GeV-TeV gamma-rays involving different time scales and the flaring mechanism is
not well understood despite long term simultaneous multiwavelength
observations. These gamma-rays en route to Earth undergo attenuation by the
extra galactic background light. Using the photohadronic model, where the seed
photons follow a power-law spectrum and a template extragalactic background
light model, we derive a simple relation between the observed multi-TeV
gamma-ray flux and the intrinsic flux with a single parameter. We study 42
flaring epochs of 23 blazars and excellent fit to most of the observed spectra
are obtained, strengthening the photohadronic origin of multi-TeV gamma-rays.
We can also constrain the power spectrum of the seed photons during the flaring
period. The blazars of unknown redshifts, whose multi-TeV flaring spectra are
known, stringent bounds on the former can be placed using the photohadronic
model.

21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex