The ASAS-SN catalogue of variable stars III: variables in the southern TESS continuous viewing zone. Issue 1 (13th February 2019)

• Record Type: Journal Article
• Authors: Jayasinghe, T; Stanek, K Z; Kochanek, C S; Shappee, B J; Holoien, T W-S; Thompson, Todd A; Prieto, J L; Dong, Subo; Pawlak, M; Pejcha, O; Shields, J V; Pojmanski, G; Otero, S; Hurst, N; Britt, C A; Will, D
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 485:Issue 1(2019)
• Page Start: 961
• Page End: 971
• Publication Date: 2019-02-13
• Subjects: catalogues -- surveys -- binaries: eclipsing; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stz444
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long-baseline (∼4 yr) light curves for sources brighter than V ≲ 17 mag across the whole sky. The Transiting Exoplanet Survey Satellite ( TESS ) has started to produce high-quality light curves with a baseline of at least 27 d, eventually for most of the sky. The combination of ASAS-SN and TESS light curves probes both long- and short-term variability in great detail, especially towards the TESS continuous viewing zones (CVZ) at the ecliptic poles. We have produced ∼1.3 million V -band light curves covering a total of ${\sim }1000 \, \rm deg^2$ towards the southern TESS CVZ and have systematically searched these sources for variability. We have identified ∼11 700 variables, including ∼7 000 new discoveries. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars data base (https://asas-sn.osu.edu/variables ). We also introduce an online resource to obtain pre-computed ASAS-SN V -band light curves (https://asas-sn.osu.edu/photometry ) starting with the light curves of the ∼1.3 million sources studied in this work. This effort will be extended to provide ASAS-SN light curves for ∼50 million sources over the entire sky.