Publikace ÚTF

The ASAS-SN catalogue of variable stars - V. Variables in the Southern hemisphere

Jayasinghe, T.; Stanek, K. Z.; Kochanek, C. S.; Shappee, B. J.; Holoien, T. W. -S.; Thompson, T. A.; Prieto, J. L.; Dong, S.; Pawlak, M.; Pejcha, O.; Shields, J. V.; Pojmanski, G.; Otero, S.; Hurst, N.; Britt, C. A.; Will, D.

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. As part of our effort to characterize the variability of all the stellar sources visible in ASAS-SN, we have produced ~30.1 million V-band light curves for sources in the Southern hemisphere using the APASS DR9 (AAVSO Photometric All-Sky Survey Data Release) catalogue as our input source list. We have systematically searched these sources for variability using a pipeline based on random forest classifiers. We have identified ~ 220 000 variables, including ~ 88 300 new discoveries. In particular, we have discovered ~ 48 000 red pulsating variables, ~ 23 000 eclipsing binaries, ~ 2200 d-Scuti variables, and ~ 10 200 rotational variables. 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). The pre-computed ASAS-SN V-band light curves for all the ~ 30.1 million sources are available through the ASAS-SN photometry data base (https://asas-sn.osu.edu/photometry). This effort will be extended to provide ASAS-SN light curves for sources in the Northern hemisphere and for V ? 17 mag sources across the whole sky that are not included in APASS DR9.
type:article
journal:Mon. Not. Roy. Astron. Soc.
volume:491
nr:0
pages:13-28
year:2020
eprint:1907.10609
grants:Cat-In-hAT: Catastrophic Interactions of Binary Stars and the Associated Transients, Horizon 2020 ERC Starting Grant 803158; 2019-2023; hlavní řešitel: Ondřej Pejcha
Časová proměnnost v astronomii: účast v projektu All-Sky Automated Survey for Supernovae; 2019-2022; hlavní řešitel: Ondřej Pejcha
Teorie a pozorování astronomických tranzientů: supernovy z hmotných hvězd a splynutí hvězd, Primus/17/SCI/17; 2017-2019; hlavní řešitel: Ondřej Pejcha
files:
jayasinghe5_pawlak_pejcha_stz2711.pdf (9964.25 kB)

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