Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DENIS Survey Data Probing Different Types of PNe   We present near-infrared photometry of a large sample of planetary nebulae
(PNe) and show that the IJK colours are a good tool to distinguish different
classes of PNe, like nebulae around symbiotic Miras or IR-[WC] PNe from genuine
PNe.

35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin