Niemczura, E.E.NiemczuraPigulski, A.A.PigulskiLehmann, H.H.LehmannKamiński, K.K.KamińskiCATANZARO, GiovanniGiovanniCATANZAROStateva, I.I.StatevaNapetova, M.M.Napetova2020-08-242020-08-242017978-83-938279-6-12545-1022http://hdl.handle.net/20.500.12386/26769A new investigation of the variability of the SPB-type star 53 Per is presented. The analysis of the BRITE photometry allowed us to determine eight independent frequencies and the combination one. Five of these frequencies and the combination frequency were not known before. In addition, we gathered more than 1800 new moderate and high-resolution spectra of 53 Per spread over approximately six months. Their frequency analysis revealed four independent frequencies and the combination frequency, all consistent with the BRITE results.ELETTRONICOenConference paperhttps://www.pta.edu.pl/proc/v5p1https://astro-staff.uibk.ac.at/~zwintz/brite2016/2017sbcs.conf..217NFIS/05 - ASTRONOMIA E ASTROFISICA