Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The simplest way to get a cluster's parameters in the Gaia era (Dolidze
  41)   The astro-photometric parameters of the open star cluster Dolidze 41, which
located in the constellation of Cygnus, have been investigated using the
Gaia-ESO DR2 large Survey merging with the near Infrared Two Micron All Sky
Survey 2MASS database. The radial density distribution (limited, core and tidal
radii), color-magnitude diagrams, the galactocentric coordinates, distances,
color excess, and age of Dolidze 41 are presented. Thanks to Gaia DR2
astrometry, which help us to define the membership of the cluster stars easily.
The luminosity & mass functions, the entire luminosity & mass, and the repose
time of the cluster have been estimated as well.

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The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat