Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SWAP Observations of Post-flare Giant Arches in the Long-Duration 14
  October 2014 Solar Eruption   On 14 October 2014 the Sun Watcher with Active Pixels and Image Processing
(SWAP) EUV solar telescope on-board the Project for On-Board Autonomy 2
(PROBA2) spacecraft observed an eruption that led to the formation of perhaps
the largest post-eruptive loop system seen in the solar corona in solar cycle
24. The initial eruption occurred at about 18:30 UT on 14 October, behind the
East Solar limb, and was observed as a a coronal mass ejection and an M2.2
solar flare. In the 48 hours following the eruption, the associated
post-eruptive loops grew to a height of approximately 400000 km (>0.5
solar-radii) at rates between 2-6 km/s. We conclude from our observations of
this event that ordinary post-eruptive loops and so-called post-flare giant
arches are fundamentally the same and are formed by the same magnetic
reconnection mechanism.

28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
3
The categories of this paper are: physics