Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variability of OI 090.4   OI 090.4 was monitored on 21 nights from 2006 to 2012 for studying the
variability. Strong variations occurred during the past 6 years. The long-term
variability amplitude is consistent with previous results. Microvariability was
analyzed for 43 intra-night light curves. 30 out of 43 light curves showed
microvariability by C and F tests analysis.

20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph