Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The All-Sky Catalog of Isolated Galaxies selected from 2MASS   We undertook searches for isolated galaxies based on automatic selection of
infrared sources from the Two Micron All-Sky Survey (2MASS) followed by a
visual inspection of their surrounding. Using a modified criterion by
Karachentseva (1973), we compiled a catalog of 3227 isolated galaxies (2MIG)
containing 6% of 2MASS Extended Sources (2MASX) brighter than $K_s = 12^m$ with
angular diameters $a_K \geq 30\arcsec$.
  The most isolated 2493 galaxies among them enter in the 2MASS Very Isolated
Galaxy Catalog, 2MVIG. Being situated in the regions of extremely low mass
density, the 2MVIG galaxies can serve as a reference sample for investigation
the influence of environment on structure and evolution of galaxies.

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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg