Аннотация:Results of a long-term (17 years) photometric monitoring of five T Tau stars in the VRI bands are presented. All the studied objects are members of the young cluster IC 348 and show the UX Ori type variability caused by changes in the circumstellar extinction. Three of them (V712 Per, V716 Per, and V909 Per) are classical T Tau type stars (CTTS) and the other two (V695 Per, V715 Per) are weak-line T Tauri stars (WTTS). Their light curves demonstrate the large diversity. Three of the objects have a combination of two different types of activity: stochastic UX Ori type variability and periodic brightness variations similar to those observed in AA Tau stars. Two of the stars demonstrate only the stochastic brightness variations owing to fluctuations in circumstellar extinction at different characteristic times. The features of the photometric activity of the stars investigated are discussed in detail in this article.
