Rapid Light Variations of the Bright Be Star φ Per

φ Per (HD 10516, HR 496) is a well known spectroscopic Be binary, with a 126.7-day period, which consists of B0.5IV primary ana a compact secondary (Gies et al., 1998). Its complex photometric behaviour including the long-term, phase locked and rapid light variations are described in Bozic et al. (1995). For the rapid variations they disclosed a formal 0.66-day period while from HIPPARCOS Hp photometry Hubert & Floquet (1998) found the value of 0.470 days.