Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: B and V CCD Photometry of Southern, Extreme Late-Type Spiral Galaxies   We present B and V CCD aperture photometry for a morphologically-selected
sample of forty-nine southern, extreme late-type spiral galaxies. All objects
are moderate-to-low surface brightness Local Supercluster field galaxies that
were detected previously in HI surveys. Our sample features objects that have
optical luminosities, optical sizes, and HI masses which are at the low end for
spiral galaxies. These objects are not a new class of galaxy, but are examples
of a common type of spiral galaxy that has been under-represented in nearby
galaxy samples. (Abridged).

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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: physics