The ASAS-SN Catalog of Variable Stars II: Uniform Classification of 412,000 Known Variables. (arXiv:1809.07329v2 [astro-ph.SR] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Jayasinghe_T/0/1/0/all/0/1">T. Jayasinghe</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stanek_K/0/1/0/all/0/1">K. Z. Stanek</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kochanek_C/0/1/0/all/0/1">C. S. Kochanek</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shappee_B/0/1/0/all/0/1">B. J. Shappee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Holoien_T/0/1/0/all/0/1">T. W. -S. Holoien</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Thompson_T/0/1/0/all/0/1">Todd A. Thompson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Prieto_J/0/1/0/all/0/1">J. L. Prieto</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dong_S/0/1/0/all/0/1">Subo Dong</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pawlak_M/0/1/0/all/0/1">M. Pawlak</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pejcha_O/0/1/0/all/0/1">O. Pejcha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shields_J/0/1/0/all/0/1">J. V. Shields</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pojmanski_G/0/1/0/all/0/1">G. Pojmanski</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Otero_S/0/1/0/all/0/1">S. Otero</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Britt_C/0/1/0/all/0/1">C. A. Britt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Will_D/0/1/0/all/0/1">D. Will</a>
The variable stars in the VSX catalog are derived from a multitude of
inhomogeneous data sources and classification tools. This inhomogeneity
complicates our understanding of variable star types, statistics, and
properties, and it directly affects attempts to build training sets for current
(and next) generation all-sky, time-domain surveys. We homogeneously analyze
the ASAS-SN V-band light curves of ${sim}412,000$ variables from the VSX
catalog. The variables are classified using an updated random forest classifier
with an $F_1$ score of 99.4% and refinement criteria for individual
classifications. We have derived periods for ${sim}52,000$ variables in the
VSX catalog that lack a period, and have reclassified ${sim} 17,000$ sources
into new broad variability groups with high confidence. We have also
reclassified ${sim} 94,000$ known variables with miscellaneous/generic
classifications. The light curves, classifications, and a range of properties
of the variables are all available through the ASAS-SN variable stars database
(https://asas-sn.osu.edu/variables). We also include the V-band light curves
for a set of ${sim}4,000$ rare variables and transient sources, including
cataclysmic variables, symbiotic binaries and flare stars.
The variable stars in the VSX catalog are derived from a multitude of
inhomogeneous data sources and classification tools. This inhomogeneity
complicates our understanding of variable star types, statistics, and
properties, and it directly affects attempts to build training sets for current
(and next) generation all-sky, time-domain surveys. We homogeneously analyze
the ASAS-SN V-band light curves of ${sim}412,000$ variables from the VSX
catalog. The variables are classified using an updated random forest classifier
with an $F_1$ score of 99.4% and refinement criteria for individual
classifications. We have derived periods for ${sim}52,000$ variables in the
VSX catalog that lack a period, and have reclassified ${sim} 17,000$ sources
into new broad variability groups with high confidence. We have also
reclassified ${sim} 94,000$ known variables with miscellaneous/generic
classifications. The light curves, classifications, and a range of properties
of the variables are all available through the ASAS-SN variable stars database
(https://asas-sn.osu.edu/variables). We also include the V-band light curves
for a set of ${sim}4,000$ rare variables and transient sources, including
cataclysmic variables, symbiotic binaries and flare stars.
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