Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TeV gamma-ray survey of the Northern sky using the ARGO-YBJ detector   The ARGO-YBJ detector is an extensive air shower array that has been used to
monitor the northern $\gamma$-ray sky at energies above 0.3 TeV from 2007
November to 2013 January. In this paper, we present the results of a sky survey
in the declination band from $-10^{\circ}$ to $70^{\circ}$, using data recorded
over the past five years. With an integrated sensitivity ranging from 0.24 to
$\sim$1 Crab units depending on the declination, six sources have been detected
with a statistical significance greater than 5 standard deviations. Several
excesses are also reported as potential $\gamma$-ray emitters. The features of
each source are presented and discussed. Additionally, $95\%$ confidence level
upper limits of the flux from the investigated sky region are shown. Specific
upper limits for 663 GeV $\gamma$-ray AGNs inside the ARGO-YBJ field of view
are reported. The effect of the absorption of $\gamma$-rays due to the
interaction with extragalactic background light is estimated.

9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom