Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi-LAT detection of GeV $\gamma$-ray emission from Type Ia supernova
  remnant G272.2-3.2   A new $\gamma$-ray source with a significance level of approximately
5$\sigma$ was reported in the region of SNR G272.2-3.2, analysing the
approximately 12.4 years of observation data from the Fermi Large Area
Telescope (Fermi-LAT). Its $\gamma$-ray spatial distribution did not show
extended feature, and it had a soft spectrum with the spectral index of
2.56$\pm$0.01 of a power-law model. No significant variability of its light
curve (LC) with 10 time bins was identified, and its spatial positions in the
X-ray and GeV bands overlapped. We suggest that the new $\gamma$-ray source is
a likely counterpart of SNR G272.2-3.2. Analysing its spectrum, we discussed
the likely origins of the $\gamma$-ray emission.

15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph