PT Per (polar): historically high state

This polar has been in very bright state since 2020 Sep (around zr=15.0 in 2021 June in ZTF data). This state is more than 1 mag brighter than when Thorstensen et al. (2020) AJ 160, 70 observed this system in 2019 Jan. Double maxima per one orbital cycle are present in ZTF data.