2019/01/31 by T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +13 · 1 citation
Physics and Astronomy · #astro-ph.SR
paper · pdf · doi:10.1093/mnras/stz444
13 pages, 12 figures. Accepted by MNRAS
arxiv created 2021/02/23 · arxiv updated 2021/02/24
The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (∼4 yrs) light curves for sources brighter than V\lesssim17 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 days, 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 ∼1000 \rm deg2 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 database (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.