Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modeling of Dust Scattering in the Coalsack   Murthy et. al.(1994) discovered intense UV (1100 \AA) emission from the
directi on of the Coalsack Nebula. We have used their results in conjunction
with a Mon te Carlo model for the scattering in the region to show that the
scattering is from dust in the foreground of the Coalsack molecular cloud. We
have constrained the albedo of the grains to 0.4 $\pm$ 0.1. This is the first
determination of the albedo of dust in the diffuse ISM in the FUV.

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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: stat