ASAS-SN Discovery of 4880 Bright RR Lyrae Variable Stars

TL;DR

This paper reports the discovery of 4,880 new bright RR Lyrae variable stars identified by the ASAS-SN survey, providing a valuable catalog for stellar variability studies.

Contribution

It introduces a large new catalog of RR Lyrae stars discovered during supernova searches, utilizing machine learning classification and visual verification.

Findings

Catalog of 4880 RR Lyrae stars publicly available

Classification accuracy demonstrated with the Upsilon random forest classifier

Expansion of the variable star database to include ~50,000 new variables

Abstract

We present a catalog of 4880 newly identified RR Lyrae variable stars (4433 RRab, 446 RRc and 1 RRd) found during the search for supernovae by the All-Sky Automated Survey for Supernovae (ASAS-SN). The light curves, classified using the "Upsilon" random forest classifier and visually verified, are available through the ASAS-SN variable star database (https://asas-sn.osu.edu/variables). The database also contains light curves for an expanding number of additional new variables (~50,000 at present) and will begin to include the light curves of known variable stars in the near future.