Niino, YuuYuuNiinoTominaga, NozomuNozomuTominagaTotani, TomonoriTomonoriTotaniMorokuma, TomokiTomokiMorokumaKeane, EvanEvanKeanePOSSENTI, ANDREAANDREAPOSSENTISugai, HajimeHajimeSugaiYamasaki, ShotaroShotaroYamasaki2021-01-112021-01-1120180004-6264http://hdl.handle.net/20.500.12386/29632We have searched for optical variability in the host galaxy of the radio variable source possibly associated with fast radio burst (FRB) 150418. We compare images of the galaxy taken 1 day after the burst using Subaru/Suprime-Cam with images taken ∼1 yr after the burst using Gemini-South/GMOS. No optical variability is found between the two epochs with a limiting absolute magnitude ≳ -19 (AB). This limit applies to the optical variability of the putative active galactic nucleus in the galaxy on a timescale of ∼1 yr, and also to the luminosity of an optical counterpart of FRB 150418 one day after the burst should it have occurred in this galaxy.STAMPAenArticle10.1093/pasj/psy1022-s2.0-85071366325000456070400003https://academic.oup.com/pasj/article/70/5/L7/51003192018PASJ...70L...7NFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_11 Relativistic astrophysics