Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Third VLBA Calibrator Survey   This paper presents the third extension to the Very Large Baseline Array
(VLBA) Calibrator Survey, containing 360 new sources not previously observed
with very long baseline interferometry (VLBI). The survey, based on three 24
hour VLBA observing sessions, fills the areas on the sky above declination -45
degrees where the calibrator density is less than one source within a 4 degrees
radius disk at any given direction. The positions were derived from astrometric
analysis of the group delays determined at 2.3 and 8.6 GHz frequency bands
using the Calc/Solve software package. The VCS3 catalogue of source positions,
plots of correlated flux density versus the length of projected baseline,
contour plots and fits files of naturally weighted CLEAN images as well as
calibrated visibility function files are available on the Web at
http://gemini.gsfc.nasa.gov/vcs3

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The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
3
The categories of this paper are: physics
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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: stat