Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: V404 Cygni with Fermi-LAT   We revisit the well-studied outburst of the low mass X-ray binary (LMXB)
system V404 Cygni, and claims of gamma-ray excesses observed with the Fermi-LAT
instrument. Upon analysing an 11.5 year dataset with the 8-year LAT point
source catalogue and 8-year background models, we find no evidence to suggest
that there is high energy gamma-ray emission during the outburst period (or at
any other time) from V404 Cygni. This is due to the proximity of V404 Cygni to
the gamma-ray emitting blazar B2023+336, a luminous source approximately 0.3
degrees away, which causes source confusion at the position of V404 Cygni, the
luminous gamma-ray background, and the use of older background models and
catalogues in previous studies.

17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: stat
3
The categories of this paper are: physics
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat