Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Catalog of Gamma-ray Glows during Four Winter Seasons in Japan   In 2015 the Gamma-Ray Observation of Winter Thunderstorms (GROWTH)
collaboration launched a mapping observation campaign for high-energy
atmospheric phenomena related to thunderstorms and lightning discharges. This
campaign has developed a detection network of gamma rays with up to 10
radiation monitors installed in Kanazawa and Komatsu cities, Ishikawa
Prefecture, Japan, where low-charge-center winter thunderstorms frequently
occur. During four winter seasons from October 2016 to April 2020, in total 70
gamma-ray glows, minute-lasting bursts of gamma rays originating from
thunderclouds, were detected. Their average duration is 58.9 sec. Among the
detected events, 77% were observed in nighttime. The gamma-ray glows can be
classified into temporally-symmetric, temporally-asymmetric, and
lightning-terminated types based on their count-rate histories. An averaged
energy spectrum of the gamma-ray glows is well fitted with a power-law function
with an exponential cutoff, whose photon index, cutoff energy, and flux are
$0.613\pm0.009$, $4.68\pm0.04$ MeV, and $(1.013\pm0.003)\times10^{-5}$ erg
cm$^{-2}$ s$^{-1}$ (0.2-20.0MeV), respectively. The present paper provides the
first catalog of gamma-ray glows and their statistical analysis detected during
winter thunderstorms in the Kanazawa and Komatsu areas.

2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org