Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Comprehensive Catalogue of Variable Stars in the field of 47 Tucanae   We present the results of a comprehensive search for stellar variability in
the globular cluster 47 Tucanae. Using the Mount Stromlo 40-inch (1m) telescope
at Siding Spring Observatory and a combined V+R filter, we have detected 100
variable stars across a 52$\times52'$ field centered on the cluster. Here we
present the V+R lightcurves and preliminary investigations of the detected
variables, which comprise 28 Eclipsing Binaries (21 contact binaries and 7
detached systems), 45 RR Lyrae stars (41 of which belong to the SMC and four
seemingly to the Galactic Halo), and 20 K-giant Long Period Variables (LPVs).
We also detected four $\delta$ Scuti stars, one TypeI Cepheid, and one TypeII
Cepheid. One variable appears to be a dust-enshrouded SMC star with a short
period pulsation. Of these 100 variables, 69 are new discoveries. Our eclipsing
binary sample indicates a radial segregation in period, and includes two
binaries that are seemingly orbited by low-luminosity stellar companions. One
RR Lyrae star shows a Blahzko effect with remarkable regularity.

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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: physics
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The categories of this paper are: cs