Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Atacama Cosmology Telescope: A Catalog of > 4000 Sunyaev-Zel'dovich
  Galaxy Clusters   We present a catalog of 4195 optically confirmed Sunyaev-Zel'dovich (SZ)
selected galaxy clusters detected with signal-to-noise > 4 in 13,211 deg$^2$ of
sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were
selected by applying a multi-frequency matched filter to 98 and 150 GHz maps
constructed from ACT observations obtained from 2008-2018, and confirmed using
deep, wide-area optical surveys. The clusters span the redshift range 0.04 < z
< 1.91 (median z = 0.52). The catalog contains 222 z > 1 clusters, and a total
of 868 systems are new discoveries. Assuming an SZ-signal vs. mass scaling
relation calibrated from X-ray observations, the sample has a 90% completeness
mass limit of M500c > 3.8 x 10$^{14}$ MSun, evaluated at z = 0.5, for clusters
detected at signal-to-noise ratio > 5 in maps filtered at an angular scale of
2.4'. The survey has a large overlap with deep optical weak-lensing surveys
that are being used to calibrate the SZ-signal mass-scaling relation, such as
the Dark Energy Survey (4566 deg$^2$), the Hyper Suprime-Cam Subaru Strategic
Program (469 deg$^2$), and the Kilo Degree Survey (825 deg$^2$). We highlight
some noteworthy objects in the sample, including potentially projected systems;
clusters with strong lensing features; clusters with active central galaxies or
star formation; and systems of multiple clusters that may be physically
associated. The cluster catalog will be a useful resource for future
cosmological analyses, and studying the evolution of the intracluster medium
and galaxies in massive clusters over the past 10 Gyr.

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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an