Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TeV Gamma-Ray Spectra Unfolded for IR Absorption for a Sample of Low and
  High Red-Shifted AGN   The H.E.S.S. collaboration recently performed the accurate measurements of
the gamma-ray spectra above 200 GeV for two BL Lac-type AGN in the Southern
sky: PKS 2155-304 and PKS 2005-489. The TeV spectrum of the BL Lac object 1ES
2344+514 has also been recently measured by the Whipple collaboration. Using
the results of phenomenological calculations of the SED of the EBL we have
extracted the intrinsic gamma-ray spectra of these blazars. Consequently we
have shown that these spectra can be fitted well by means of a synchrotron self
Compton model.

12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
2
The categories of this paper are: math
9
The categories of this paper are: nlin
18
The categories of this paper are: econ