Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Distance of the Large Magellanic Cloud Cluster NGC 1866   Hubble Space Telescope V,I photometry of stars in the Large Magellanic Cloud
Cluster NGC 1866 shows a well defined cluster main sequence down to V=25 mag,
with little contamination from field or foreground stars. We use the main
sequence fitting procedure to link the distance of NGC 1866 to the Hipparcos
determination of the distance for the Hyades MS stars, making use of
evolutionary prescriptions to allow for differences in the chemical
composition. On this basis we find a true distance modulus for NGC 1866 of
18.35 +/- 0.05 mag. If the cluster is assumed to lie in the LMC plane then the
LMC modulus is 0.02 mag less.

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The categories of this paper are: stat
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The categories of this paper are: math
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ph