Long-term BV RI photometric light curves of 15 PMS stars in the star-forming region IC 5070

This paper reports results from the multicolor photometric observations of 15 pre-main sequence stars collected in the period September 2010 – October 2017. The stars from our study are located in the star-forming HII region IC 5070. These objects were previously detected as either emission line stars, flare stars, T Tauri variables or Herbig Ae/Be stars. Photometric observations, especially concerning the long-term behavior of the objects, are missing in the literature. We present the first photometric monitoring for all stars from our study. The analysis of the obtained BV RI photometric data allows us to draw the conclusion that all investigated objects are variable stars. In the case of LkH α 146, we identified previously unknown periodicity in its photometric variability.