Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NYU-VAGC: a galaxy catalog based on new public surveys   Here we present the New York University Value-Added Galaxy Catalog
(NYU-VAGC), a catalog of local galaxies (mostly below a redshift of about 0.3)
based on a set of publicly-released surveys (including the 2dFGRS, 2MASS, PSCz,
FIRST, and RC3) matched to the Sloan Digital Sky Survey (SDSS) Data Release 2.
Excluding areas masked by bright stars, the photometric sample covers 3514
square degrees and the spectroscopic sample covers 2627 square degrees (with
about 85% completeness). Earlier, proprietary versions of this catalog have
formed the basis of many SDSS investigations of the power spectrum, correlation
function, and luminosity function of galaxies. We calculate and compile derived
quantities (for example, K-corrections and structural parameters for galaxies).
The SDSS catalog presented here is photometrically recalibrated, reducing
systematic calibration errors across the sky from about 2% to about 1%. We
include an explicit description of the geometry of the catalog, including all
imaging and targeting information as a function of sky position. Finally, we
have performed eyeball quality checks on a large number of objects in the
catalog in order to flag deblending and other errors. This catalog is
complementary to the SDSS Archive Servers, in that NYU-VAGC's calibration,
geometrical description, and conveniently small size are specifically designed
for studying galaxy properties and large-scale structure statistics using the
SDSS spectroscopic catalog.

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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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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: ao-sci
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The categories of this paper are: q-alg