Rebrightening of AT2020plo dwarf nova
ATel #13955; A. Valcheva (Sofia University), P. Nedialkov (Sofia University), E. Ovcharov (Sofia University)
on 20 Aug 2020; 06:01 UT
Credential Certification: Evgeni Ovcharov (evgeni@phys.uni-sofia.bg)
Subjects: Optical, Cataclysmic Variable, Nova, Transient
We report a rebrigtening of the WZ Sge-type dwarf nova AT2020plo (ZTF20ablyczu, ATel #13869). The transient was discovered by Zwicky Transient Facility (ZTF) on 2020 July 15.488 and is located at 00:44:20.17 +41:34:08.1 (J2000).
AT2020plo was observed on 2020 Aug 17.98 UT, more than a month after the discovery and was faded to R=20.3 ± 0.4 mag. On 2020 Aug 18.96 UT the transient had R=17.08 ± 0.03 mag which shows a rapid rebrightening in 1 day with an amplitude of 3.2 mag. The observations were carried out with the 50/70 Schmidt telescope at Rozhen NAO Bulgaria and the transient was detected on 5x300sec co-added R images.
The observed rebrightening of AT2020plo is consistent with a single rebrightening WZ Sge-type stars such as ASAS J002511+1217.2 (Golovin et al., 2005, Pavlenko, 2007) and RZ Leo (Ishioka et al., 2001). Their light curves are characterized by large amplitude superoutburst and a smaller amplitude rapid rebrightening.
50/70 Schmidt telescope images
This work was supported by the Ministry of Education and Science of the Republic of Bulgaria, National RI Roadmap Project DO1-277/16.12.2019 and NSF Bulgaria grant DN18/10-11.12.2017.
