Investigation of non-equilibrium ionization plasma during a giant flare of UX Arietis triggered with MAXI and observed with NICER

Miki Kurihara, Wataru Buz Iwakiri, Masahiro Tsujimoto +7

We detected a giant X-ray flare from the RS-CVn type binary star UX Ari using MAXI on 2020 August 17 and started a series of NICER observations 89 minutes later. For a week, the en…